Bird’s eye of activities – sortable

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Collecting the most candy
Use your student’s Halloween enthusiasm to do a study on volumes.  We’ve created an activity that asks students to calculate the volume of candy containers that are silly and intriguing ...
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Collecting the most candy
Giant Pumpkins
Let your students marvel at World Record winning giant pumpkins as they use proportions to calculate the quantities of pumpkin puree and the number of pumpkin pies that could be ...
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Giant Pumpkins
I should have invested!
Students use yearly percent increase data to decide which stock: Apple, Disney or Amazon, they should have invested in way back in 2015. What was the net gain of these ...
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I should have invested!
Halloween spending 2021
Use our current data on Halloween spending in America to engage your students in an analysis of the ratios and percents of population, participation, and money spent in honor of ...
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Halloween spending 2021
Which sale would you rather use?
In this short activity, students decide if these two sales are the same. If not, which is better? How would you explain this to someone? ...
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Which sale would you rather use?
Federal debt and deficit – What are they?
national debt What's the big deal with our national debt?  Do we actually borrow money to cover our debt?  If we do, imagine the interest charges? Help your students (and ...
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Federal debt and deficit - What are they?
Indigenous Peoples or Columbus Day
*** Two activities *** When Columbus landed in Guanahani (renamed San Salvador, Bahama Islands by Columbus), he began the European settlement of the New World. Guanahani was inhabited by the Taíno ...
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Indigenous Peoples or Columbus Day
Chuck E. Cheese needed to shred
Chucky E. Cheese needed to shred 7 billion tickets at a cost of 2.3 million dollars. Was this the real cost of shredding them? ...
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Chuck E. Cheese needed to shred
Watson saves
Students use the Pythagorean Theorem with Ben Watson's incredible tackle to figure out how far he must have run. Truly phenomenal play! ...
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Watson saves
Fall Equinox 2021
Updated for 2021! Tuesday, September 22, 2021 at 19:21 UTC (which is the same as 3:21 am EST), will be the Autumnal Equinox.  It is the time of year when the ...
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Fall Equinox 2021
Death Valley, CA – How hot was it?
Take a guess at what the Fahrenheit reading on this sign must have been. How did you make that guess? Use the Fahrenheit conversion formula to calculate the missing number ...
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Death Valley, CA - How hot was it?
Monarch’s are flying south again
In mid-August and early September, the Monarch butterflies begin their annual migration south to more moderate climates to hibernate and overwinter.  It is an incredibly long migration and fascinating to ...
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Monarch's are flying south again
Viral Growth – Talk like a Pirate Day
Sunday, September 19th is talk like a pirate day. Bring some humor and marketing understanding into your class with this activity about a silly holiday that has had viral growth ...
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Viral Growth - Talk like a Pirate Day
Steepness and fall hiking
Combine colorful and cool fall hiking with a little mathematics about percent grade change. What is a steep grade? Why is it in percent? How does grade change relate to ...
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Steepness and fall hiking
Hurricanes, Typhoons, and Cyclones
This is the season for increased cyclonic activity around the globe. Typhoons, Hurricanes, and Cyclones are measured with an Accumulated Cyclone Energy score (ACE). Does it correctly describe these events? ...
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Hurricanes, Typhoons, and Cyclones
Labor Day 2021
What is this holiday about?  Are we celebrating the start of school?  New cars? The end of summer? Students look for patterns in the history of Labor Day dates. They ...
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Labor Day 2021
Just ONE hot dog
A newly released nutritional and environmentally sustainable study shows that eating just one hot dog can take 36 minutes off your total healthy lifespan. How many would you have to ...
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Just ONE hot dog
Back to school activities
Who's going back to school? - Students calculate the historical changes in U.S. population percentages of people who are going back to school and try to formulate reasons for these variations. 6.EE, ...
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Back to school activities
Haiti’s earthquake and the Richter scale
On August 14th, Haiti was hit with a powerful 7.2 magnitude earthquake. What does a 7.2 magnitude earthquake imply? What's a seismometer.  What is the amplitude of a seismograph and ...
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Haiti's earthquake and the Richter scale
That’s a big tomato!
These Aussi tomatoes (the tomato on the left of all of the tomatoes) are huge.  How much do you guess one weighs? Can you figure it out? ...
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That's a big tomato!
Let’s learn to gerrymander
In this activity student try to redistrict our pretend state in order to preserve the overall state's leanings in its new districting plan.  Then students redistrict the same state in ...
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Let's learn to gerrymander
How many athletes brought home no medal?
Probably most of the athletes that went to Tokyo didn't win a Gold, Silver, or Bronze medal.  We couldn't find any numbers about these people.  Can you figure it out ...
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How many athletes brought home no medal?
How much will it cost this year to go back to school?
In this activity students work together to decide what equipment or supplies are necessary and how much they might cost. They research actual supply costs and finally decide how long ...
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How much will it cost this year to go back to school?
The new R-naught number
Now we're plagued with the Delta variant of the coronavirus.  What was the original virus' R-naught number and what has it become? ...
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The new R-naught number
The drag in swimming – 5 Olympics activities
To win in Olympic swimming, contestants have to be incredibly fit and have marvelous endurance and technique.  Do they also need to consider the science of their motions and their ...
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The drag in swimming - 5 Olympics activities
Need to rent some chaise lounges
Here's the rental sign. How much will 6 lounges and 2 umbrellas cost? ...
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Need to rent some chaise lounges
Olympic Skateboarding + more
We are very excited to see skateboarding as an event in the Tokyo Olympics.  Skateboarding is athletic, artistic and difficult to master.  Why has it taken so long to become ...
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Olympic Skateboarding + more
Ranked Choice Voting in NYC
New York City is still tallying its election results for a new Mayor.  This year they tried Ranked Choice Voting.  What does that mean? How does that work?  What are ...
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Ranked Choice Voting in NYC
Betsy Ross’s 5-pointed star + 4th of July activities
3 activities for the Fourth of July: (1) Folding analysis to make a 5-pointed star; (2) Parabola manipulation to create a fireworks image on your calculator; and (3) Ratios, creativity, ...
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Betsy Ross's 5-pointed star + 4th of July activities
How much is a trillion dollars?
U.S. Congress is now debating how much money to approve on spending for infrastructure.  The numbers are between 1 and 3 trillion dollars. I can't even fathom that amount of ...
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How much is a trillion dollars?
Penny Wars anew
Students judge from apparent diameters and penny heights, which jar has the most money. Mrs. Mercado had 3 pictures of scales with two jars on each balance. That is another ...
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Penny Wars anew
Father’s Day and the Summer Solstice
Two activities for Father's Day, one activity for the summer solstice, and lots of chocolate fun ...
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Father's Day and the Summer Solstice
What is Juneteenth?
Language just updated! You can appreciate why this is such a great celebration when you look at the stages and some of the events and dates of America moving towards ...
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What is Juneteenth?
Do caffeinated drinks have similar amounts of jolt?
Repaired! We found this interesting caffeine infographic at visual.ly. Wonderings? How many McDonalds coffees do I need to get the same amount of caffeine that I would get in a Starbucks ...
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Do caffeinated drinks have similar amounts of jolt?
Payday loans – What are they?
What is a payday loan? How is it different from a bank loan or debt on a credit card? Is this a good idea? ...
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Payday loans - What are they?
Monopoly and summer games
In the board game, Monopoly, does a property’s distance from GO correlate to its rent when you land on it? Using Brian’s spread sheet (list of properties, distance from GO, ...
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Monopoly and summer games
Nathan’s Hot Dog eating contest will return this year
Nathan's Famous Hot Dog Eating Contest has been held each July 4th since 1972. What do you wonder about this event? What questions do you have from looking at all ...
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Nathan's Hot Dog eating contest will return this year
Memorial Day 2021
Who are we honoring?  How did the holiday come about?  Isn't Memorial Day usually on May 30th? Students learn a little about the history of the holiday, analyze the possibilities and ...
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Memorial Day 2021
Tree for Springtime
Here in the Northeast, flowers are blooming and trees are leafing out. We thought the creation of a tree that grows before your eyes might be akin to what is ...
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What is happening here?
Can I get your order right?
Updated! You can order a ton of combos at Chipotle.  They advertise that there are 65,000 ways to order their meals.  Do you think that is correct? ...
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Can I get your order right?
Shooting for Three
The NBA court has a 3-point line that separates how many points a player will earn for his team by making a basket from outside of that line. Teams have ...
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Shooting for Three
AQI – Air Quality Index
The AQI is a measurement of how much particulate matter, dangerous ozone, carbon monoxide, nitrogen dioxide and sulfur dioxide there is in the world's atmosphere at any one time and ...
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AQI - Air Quality Index
How much did the tooth fairy give you when you lost a tooth?
What was the going tooth rate in your house? Do you think that, on average, you were paid well or were you disappointed?  Was your first tooth lost especially remunerative? ...
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How much did the tooth fairy give you when you lost a tooth?
Mother’s Day 2021 – 13 activities
We have 13 possible activities for you to use to help honor and celebrate Mother's Day in your class. Diapers, chocolate, Mother's Day spending, and more ...
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Mother's Day 2021 - 13 activities
Guacamole for Cinco de Mayo – buy it or make it at home?
Students have the guac ingredient list and the price of each ingredient in their usual quantities ... like a bottle of lime juice. But we don't need the whole bottle ...
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Guacamole for Cinco de Mayo - buy it or make it at home?
It’s tick time again … and Lyme disease
Spring is the start of tick encounters. Help students study the prevalence of Lyme disease in the US; in their own state; and methods for preventing it. What are your ...
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Deer tick
Does an NFL player’s draft order mean a lot for the player?
Students interpret the graph relating draft pick number and contract value. They consider how much being selected earlier or later, either by a few picks or rounds effects a player's ...
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Does an NFL player's draft order mean a lot for the player?
Shoprite’s solar energy goals on the African continent
Shoprite is the largest supermarket chain in Africa.  The company is presently engaged in increasing their use of solar power to harness the abundant natural resource of solar potential on ...
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Shoprite's solar energy goals on the African continent
Earth Day 2021
Thursday, April 22nd is Earth Day - We have 15 interesting activities that support recycling, conserving resources, noticing climate change and protecting our planet. The shape of Louisiana - At what rate is the ...
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Earth Day 2021
Which car, hybrid or electric, should I buy?
Students create equations for finding the break-even points of hybrid and electric vehicles by mileage and years of ownership.  They work with systems of equations to find the number of ...
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Which car, hybrid or electric, should I buy?
Will our U.S. flag change yet again?
How many stripes are in our present flag pictured above?  (The bottom right flag that has been in use since 1960.) How many stars? What do the numbers of stars ...
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Will our U.S. flag change yet again?
Greatest March Madness program
Gonzaga just won the finals of this year's March Madness tournament. Still, which NCAA teams have had the best basketball programs over the years.  Students decide which stats count towards ...
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Greatest March Madness program
Man paid in 500 pounds of greasy pennies!
In this 3-act activity, students learn about the story, watch a PowerPoint presentation about the issue, and try to calculate the amount of money in this pile. Copper pennies, zinc ...
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Man paid in 500 pounds of greasy pennies!
Spring and Easter posts
5 timely activities that help mark Spring and Easter. Dyeing eggs, approximating number of Peeps sold, counting backwards to find planting dates, reading a pie chart on candy sales, and ...
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Spring and Easter posts
Peeps
This activity is a investigation intended to get students and teachers to loosen up a little and appreciate how just considering a situation might lead you to a very reasonable ...
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Peeps
Does seeding really matter?
 Engage your students in percents as they get excited about March Madness. Is getting a higher seed really an advantage?  Use 30 years of data to help determine for which seeds ...
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Does seeding really matter?
YUMMY food for Passover
Passover will begin this year at sundown on Saturday, March 27th. Jewish families will gather to commemorate the exodus of the Children of Israel from slavery in Egypt. The celebration begins ...
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YUMMY food for Passover
The Perfect Bracket
What are your chances of picking every game? How does the change from 64 to 65 to now, 68 teams in the field complicate things?  How many brackets would you need ...
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The Perfect Bracket
How hard is it to find a 4-leaf clover? … and more for Saint Patrick’s Day
Three Saint Patrick's Day activities. (1) The probabilities of finding a 4-leaf clover; (2) the necessary proportion to dye the Chicago river green for the day; and (3) nutritional evaluation ...
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How hard is it to find a 4-leaf clover? ... and more for Saint Patrick's Day
How does starting Daylight Savings Time make you feel?
In this class opener activity, we've asked students to how this time shift will feel. Does a shift ahead make you go to bed later or earlier? Will you lose ...
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How does starting Daylight Savings Time make you feel?
3/14 – Pi Day is almost here
We have 8 activities to help you celebrate π in your school and in your math class with activities that demonstrate how π was derived; visually show why π makes sense; show a surprising ...
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3/14 - Pi Day is almost here
How many scoops do I need?
In this 3-act activity, students need to invent a different way to measure the powdered chocolate than what the instructions dictate. How many 1/4th teaspoonsfuls of powder = 2 teaspoons? ...
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How many scoops do I need?
The Iditarod race will be different this year
We have two Iditarod activities for you and your classes to choose from. Appreciate the "Greatest Race on Earth"! ...
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The Iditarod race will be different this year
Dunkin’s Go2s
Simultaneous equations with a Dunkin Donuts' sandwich deal. Do you have enough information to solve it? ...
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Dunkin's Go2s
8 cold and snowy activities
How much snow is that? - How many inches of snow produced that pile?  How much snow in volume is on top of the car?  How much could that snow weigh? Approximation, ...
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8 cold and snowy activities
John Urschel, retired Baltimore Raven and Black mathematician
In this activity, students can learn about this mathematician and retired pro football player as they read to create a timeline of his life and accomplishments.  They compare his milestone ...
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John Urschel, retired Baltimore Raven and Black mathematician
At least the days are getting longer
What's your guess?  How fast are the number of daylight hours changing each day?  Are the changes dramatic or subtle? Students make guesses; compute how long, on average, the change in ...
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At least the days are getting longer
How should I spend my rewards?
For every dollar that you spend, you accumulate points.  You can cash them in for savings on groceries, apply them to your gasoline purchases, or even use them to give ...
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How should I spend my rewards?
11 Valentine & 2 President’s Day activities
We have 11 great Valentine's activities + 2 President's Day tasks. Enjoy the season! ...
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11 Valentine & 2 President's Day activities
Lunar New Year 2021 – Year of the Ox
Celebrated by 1/4th of the world's population, Lunar New Year begins on Friday, February 12th. This will be the year of the Metal Ox.  The year's name is a combination ...
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Lunar New Year 2021 - Year of the Ox
9 Super Bowl activities
As the Super Bowl approaches, engage your students with any or many of our football activities ...
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9 Super Bowl activities
Typical Super Bowl scores
Just updated! In this activity students study historical Super Bowl data to reflect on average (mean, median, and mode), losing scores, winning scores, and range of scores. They are asked to judge ...
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Typical Super Bowl scores
Will Phil see his shadow?
How often does Punxsutawney Phil get it right? Relative frequency! A cute animal will make your students smile as they calculate the relative frequency of Phil's correct past predictions ...
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Will Phil see his shadow?
Super Bowl Numerals
Introduce Roman numerals to your class.  In this activity students learn the rules for evaluating Roman numerals, decipher copyright dates, see how Roman numerals are used today, and do some ...
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Super Bowl Numerals
Lots of pieces
Brian has a lot of puzzles.  His family must love working on them. What do you wonder about his puzzles? What do you notice? Make an educated guess, about how ...
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Lots of pieces
Powerball & MegaMillion Probability
Powerball and MegaMillion jackpots are growing all the time.  Having a terrible chance of winning nearly a BILLION dollars might be a context that engages your students.   Examine compound probability ...
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Powerball & MegaMillion Probability
Crazy basketball score
Wow! Look at that score! There were some scoreboard malfunctions in this December 15, 2020, pre-season game. What might have been the final score if this game progressed at this ...
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Crazy basketball score
Inauguration Date
The date of the Presidential Inauguration this year can be written in an interesting way. What do you notice?  What do you wonder?  Do you think that this happens often ...
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Inauguration Date
Martin Luther King, Jr and social justice
We have 6 activities on Martin Luther King and the movement to a more fair and equal representation of Black lives in America. A timeline of KIng's life; a timeline ...
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Martin Luther King, Jr and social justice
How much snow is that?
Start this activity with: What do you notice? What do you wonder? How many inches of snow produced that pile?  How much snow in volume is on top of the car?  How ...
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How much snow is that?
Will 2021 be a “prime” year?
Will this be a prime year? We sure hope so. What do you have to do to check it out? ...
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Will 2021 be a "prime" year?
Earth’s perihelion
On Saturday, January 2nd, 2021, Earth will be as close as it gets to the Sun during its orbit. Shouldn't that make this the warmest time of the year? In ...
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Earth's perihelion
The Times Square ball
It's a gorgeous ball, covered with Waterford Crystal triangles, shaped as a geodesic icosahedron.  Every New Year's Eve it descends in Times Square to mark the beginning of the new ...
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The Times Square ball
Family fun math activities
Point of view - With any set of cubes, enjoy building this creation using our two view-point pictures. How many blocks are in my stack?  What is the least number of blocks that ...
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Family fun math activities
Winter Holidays – 18 activities
Do I have enough wrapping paper? - Students estimate the size of a gift and decide if the given wrapping paper is going to be enough.  Finally they try to create a ...
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Winter Holidays - 18 activities
Winter solstice
Students appreciate how their latitude effects the darkness of their late afternoon location as they study the earth's tilt and the logic of daylight hours. Is latitude the central angle ...
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Winter solstice
December 21, 2020 – Great conjunction
Right now, just after sunset, in the southwest sky, you can check out the planets of Jupiter and Saturn as they get closer and closer to each other. They are ...
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December 21, 2020 - Great conjunction
Wind chill
Students use the National Weather System chart to gauge wind chill, examine the patterns that correlate increasing wind and/or decreasing temperatures, use wind chill numbers to estimate possible wind and ...
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Wind chill
Hanukkah already?
3 Hanukkah activities; the amazing Hebrew calendar, soda menorah, and potato latkes. In the calendar activity, students look at the Hebrew calendar and appreciate the incredible mathematics involved in creating ...
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Hanukkah already?
Holiday soda displays
The holidays are coming! We found these timely soda displays made up entirely of 12-pack of Coca-Cola products. What questions do you have? Clicking on either image will show them ...
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Holiday soda displays
The new largest Lego set ever – The Roman Colosseum
Note: This is a remake of our 2014 and 2017 activities "How Much Does a Lego Cost?". How much could the Roman Colosseum Lego set cost ? Student first make ...
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The new largest Lego set ever - The Roman Colosseum
Thanksgiving, Black Friday, football and giving (12 activities)
How should I cook my turkey? - Students judge timing, cost, tastiness, and quantity necessary as they plan for the feast. 4.MD.1, 5.NBT.7, 4.MD2, 6.RP.3, 6.NS.3, 7.NS.3  Great video on a deep ...
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Thanksgiving, Black Friday, football and giving (12 activities)
Black Friday
When shopping next Friday, students will be able to add some understanding and analysis to the trip after calculating savings in dollars and percents with this timely investigation ...
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Black Friday
Not enough mashed potatoes
Updated activity for Covid 19 appropriate Thanksgivings. Students change decimals to fractions, calculate ingredient measures for various-sized Thanksgiving servings, explain their thinking in calculating these figures, and judge how many ...
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Not enough mashed potatoes
Lots of Cranberries
In this timely activity, students learn about how cranberries are grown and harvested; estimate their size and quantities; and see what they can deduce from published statistics ...
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Lots of Cranberries
Canstruction
Just before Thanksgiving there are competitions all over the world to celebrate cool design, tricky engineering, and to donate a whole lot of food. How many cans does it take ...
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Canstruction
Veterans Day 2020
Here are two very different maps about where Veterans live in the U.S. and which states have the largest density of Veterans citizens. What do these two maps make you ...
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Veterans Day 2020
Leaves are pretty but …
In this activity students see the inverse relationship between number of workers and time to complete the whole job. They graph hyperbolas and consider how long the extreme condition of ...
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Leaves are pretty but ...
Ravensburger huge puzzle
Students surmise what the difficulty of a jig saw puzzle entails and use rate calculations to estimate finishing times. They try to confirm whether doubling the number of pieces really ...
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Ravensburger huge puzzle
5 Election activities
Is the Electoral College vote similar to the Popular vote?  The winner of the Presidential Popular vote (November 3, 2020) is not always the same as the winner of the ...
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5 Election activities
14 activities for Halloween
Fourteen activities that will please and intrigue your students as October comes to an end ...
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14 activities for Halloween
Vampire Bats
 Ooooo. Scary!  This is a slightly didactic activity on vampire bats.  We've given lots of interesting metric and customary unit facts and asked students to relate those sizes to more familiar ...
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Vampire Bats
Candy deals
We found big mixed bags of candy at really good prices ... we think. Students are asked to decide which would be the best deal and the worst deal on candy ...
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Candy deals
Is the Electoral College fair?
After showing the video consider asking your students what the grouping of students must have been for "colored pencils" to win the class electoral college?  Is there more than one ...
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Is the Electoral College fair?
Is the Electoral College vote similar to the Popular vote?
The winner of the Presidential Popular vote (November 3, 2020) is not always the same as the winner of the Electoral College vote (January 6, 2021). In this activity students ...
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Is the Electoral College vote similar to the Popular vote?
Electoral College vs. the popular vote
Click the map to create your own at 270toWin.com Let your students see how votes really count with our activity on the Electoral College.  Can someone win the popular vote ...
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Electoral College vs. the popular vote
Monster cake
First, students need to find the surface area that the M&Ms cover in order to approximate how many M&Ms she needs to finish her cake. When Brian tried to make ...
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Monster cake
How much chocolate is left?
Fraction operations might be more interesting when it involves chocolate. Students reason and calculate what is left of these chocolate bars.  The bars are the same size but are molded ...
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How much chocolate is left?
2 Hiking Activities
Appalachian Trail Needs - Calculating the needs and rates involved in enduring this 2,168 mile trek. Steepness and Fall Hiking - Use a little mathematics about percent grade change in ...
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2 Hiking Activities
Can you show that the Pythagorean Theorem works?
Use this activity to help your students work through the meaning of the Pythagorean theorem. Pythagorean theorem experiences are often skill and drill work with contrived right triangle problems. In ...
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Can you show that the Pythagorean Theorem works?
Extreme weather 2020
Use the open number line and our lists of temperature extremes to make signed number operations and absolute value sensible. Students compare record high and low temps (integers) and use ...
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Extreme weather 2020
How many gumballs are there?
Thinking, estimating, and calculating! How many gumballs are there? How much would it cost to buy them all? How long would it take me to buy them all? ...
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How many gumballs are there?
NBA Finals 2020
Exploring NBA championship data. Check out the dominance of a select few teams in NBA history.  Students work the data, data representations and statistics.  For which kind of observations are ...
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NBA Finals 2020
Labor Day 2020
What is this holiday about?  Are we celebrating the start of school?  New cars? The end of summer? In this short activity, students learn about the intended meaning of Labor ...
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Labor Day 2020
USPS needs help!
Students learn how the Postal Service is funded and try to decide how the USPS could earn more or spend less in their operation.  They finally get to think about ...
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USPS needs help!
Ramen noodle heist
In 2018, the trailer of a truck filled with Ramen noodles was stolen from a parking lot in Georgia. The trailer contents were valued at $98,000. What do you wonder ...
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Ramen noodle heist
Do you want to be an NBA virtual fan?
For health concerns, professional sports now have no actual live fans. To help generate the excitement and semblance of fans, some teams use cardboard cutouts of people.  Some use Zoom ...
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Do you want to be an NBA virtual fan?
How big is this hornet really?
Giant hornets have now migrated to North America. In this activity students take the hornet's measurements in millimeters and try to draw the hornet, life-sized, on centimeter graph paper. They ...
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How big is this hornet really?
It might be a good year to see the Perseid meteor shower
Catching a productive meteor shower can be a stunning experience.  On the evenings and mornings of August 11th, 12th and 13th there could be a very good show.  A last ...
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It might be a good year to see the Perseid meteor shower
Largest s’more ever!
What is reasonable.?  How many marshmallows are in this recipe?  How many people could this cookie feed? How many marshmallows could you eat? ...
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Largest s'more ever!
What does the data show?
When you look at the new case numbers of the Coronavirus in the U.S. and compare that with various world and national events and our present scientific understandings, what do ...
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What does the data show?
How much water should you be drinking?
Student develop and use formulas for calculating their water needs ...
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How much water should you be drinking?
How fast will my new puppy mature?
There is a new dog aging formula that depends on methyl markers that adhere to the DNA molecules of living things.  Now we know that dogs don't age as we ...
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How fast will my new puppy mature?
Does the new “Most Stuf” Oreo have an exorbitant amount of stuf?
How much more "stufed" are they compared to Triple Double Oreos, Double Stuf Oreos or even Original Oreos. Does this look yummy to you or gross?  Why are they filled ...
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Does the new "Most Stuf" Oreo have an exorbitant amount of stuf?
String design, ellipses, and orbital mechanics
Artistic way to encourage understanding of a conic section.  Participants physically build an ellipse by choosing two foci and sketching the figure through a loop of string. While stitching an ...
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String design, ellipses, and orbital mechanics
Coronavirus trends
Johns Hopkins University of Medicine has a team that maintains current maps and data about the Coronavirus.  They record changes and show trends of the virus activity throughout the World ...
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Coronavirus trends
Summer Solstice, the longest day
Sunday, June 20th, 2021 Sunrise on summer solstice at Stonehenge On Sunday, June 20th, at 11:31 pm EDT, the Earth's North Pole will be tilted as far towards the Sun as ...
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Summer Solstice, the longest day
Celebrating Father’s Day
Thank you Mother and Father for all of those diapers - Which is a better deal, cloth or disposable diapers?  How much did you cost your parents in diapers?  In the ...
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Celebrating Father's Day
National Donut Day
Two activities to help celebrate National Donut Day How many donuts is that = huge box of donuts to approximate. How have donuts changed = torus volume measurements, formula intuition, ...
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National Donut Day
I bought toilet paper online
Students use the pictures in this activity to approximate the size of this 16 roll package of bamboo toilet paper. They use comparison ratios with our Ruth Bader Ginsburg doll ...
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I bought toilet paper online
A socially-distanced party
I risked infecting my friends or becoming infected myself by throwing a very small socially-distanced party.  I served baked appetizers, disinfectant wipes, and latex gloves.  I cooked while wearing clean ...
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A socially-distanced party
May 27th launch from the U.S. again
NASA and SpaceX plan to launch humans from Kennedy Space Center, Florida, to the International Space Station for the first time since July 11, 2011. This is a more current ...
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May 27<sup>th</sup> launch from the U.S. again
Big beach towel
Since beaches are starting to open again, we thought this activity might bring smiles and hopes. Act One: Check out this beach towel!  What do you wonder? What would you like ...
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Big beach towel
Fish tale, go figure!
I have two fish in my aquarium.  Betty is my white goldfish. She often stays really close to the front wall as she swims towards her food. Stripe, my clownfish, ...
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Fish tale, go figure!
Tiny vacuum with a huge reach
Wow! This vacuum can clean up to 2,800 square feet while using only one electrical outlet. How long must its cord be? ...
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Tiny vacuum with a huge reach
Sadly, Jorge passed away yesterday.
Jorge would have been 15 years old on May 5, 2020. We wondered how old that would have been in human years. Does that 7 times his dog years formula ...
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Sadly, Jorge passed away yesterday.
Microns and Masks
How big is a coronavirus cell? How big is a micron? How well do these masks protect against the virus? What can you observe about the size of particles mentioned? ...
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Microns and Masks
Stock Market headlines – Biggest losses since 2008
Biggest losses since 2008 - The Dow is measured in points but this decline can also be measured in the percentage lost.  Which way was the Dow being measured when ...
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Stock Market headlines - Biggest losses since 2008
World record Snickers Bar
This World Record Snickers Bar was created in late January at the Waco, Texas Mars Wrigley Plant. What proportions would be an accurate cross sections of this monster bar? How ...
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World record Snickers Bar
Mixing colors with food dye
It's time to dye eggs ... or make a rainbow colored cake. Proportions, saturation, hue and shade ...
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Mixing colors with food dye
Hoarding stopped!
A Danish market found an interesting way to limit hoarding of hand sanitizer. How much are these costs in your currency? What is the unit price on these bottles? By ...
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Hoarding stopped!
Weird and spooky puzzles for April Fool’s Day
This day is known for pranks and puzzles.   Try one of these 4 activities on April Fools Day. Ask students to analyze where I made my mistake     ...
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Weird and spooky puzzles for April Fool's Day
Pascal coloring and modular math
Clock math, 1,2,3,4,5,6,7,8,9,10,11,12,1,2,3,4,5,6,7... is modular math. Let your students learn about the usefulness of modular math as they color and explore Pascal's Triangle. Very pretty math! ...
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Pascal coloring and modular math
Some of our activities that are good for at-home learning
We've got hundreds of great activities that demonstrate how math happens all around us.  Let your student choose an activity that interests him/her and enjoy the discoveries ...
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Some of our activities that are good for at-home learning
Is there much of a difference between 99.9% or 99.999%?
Use our present need for cleanliness to engage your students. Does it really matter whether you kill 99.9% of the bacteria or 99.999% of the germs? In this activity, we've ...
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Is there much of a difference between 99.9% or 99.999%?
Which gasoline is the cheapest?
A comparison of gasoline in Greece, priced at Euros per liter, and gas in Massachusetts at dollars per gallon. Price and liquid volume conversion using unit fractions ...
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Which gasoline is the cheapest?
Iditarod – The Last Great Race
The Iditarod Dog Sled Race will begin this year on Saturday, March 7th in Anchorage, Alaska. It is often called The Last Great Race on Earth because it is so long and grueling ...
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Iditarod - The Last Great Race
How many delegates does each state get to send to the Democratic Convention?
Students reason about the meaning of this formula. They evaluate the formula for South Dakota and their state of choice to understand the weight of each state's power in choosing ...
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How many delegates does each state get to send to the Democratic Convention?
Gonna be a Leap Year
This year we will add the 29th of February to our year?  Why do we do that?  How can you tell?  What if we didn't add a day every 4 ...
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By George C. Baxley
Mardi Gras or Fat Tuesday
Students get a chance to examine the monetary and environmental cost of this bead exuberance with our unit pricing and recycling activity ...
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Mardi Gras or Fat Tuesday
K-Pop and BTS, how much can they earn from Youtube and Spotify?
How much could this K-pop group possibly earn on Youtube and Spotify? Unit ratio calculations. BTS ...
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K-Pop and BTS, how much can they earn from Youtube and Spotify?
Movies and the upcoming Oscars
Compounded percent change; central tendencies; the weight of Rapunzel's 70 feet of hair; Godzilla's height by comparison; how to measure the profitability of a movie series; most appropriate graphical representations; ...
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Movies and the upcoming Oscars
Do the best movies make the most money?
Do the "Best" movies make the most money?  How could you measure the "best" movie? What information would you need to make this judgement? At most ten movies are nominated each year to ...
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Do the best movies make the most money?
02022020
What do you wonder?  Why is this string of digits special?  What will be the next number like this one? ...
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02022020
Expensive Super Bowl ads
What will a 30-second Super Bowl ad cost this year? Next year? In the future? How would you describe this rise in cost? ...
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Expensive Super Bowl ads
How steep is this treadmill?
In this very short activity, students get a memorable way to visualize a zero slope and an undefined slope ...
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How steep is this treadmill?
It’s Girl Scout cookie time again!
Totally new activity! Let your students talk about their favorite Girl Scout cookies as they figure out what the local GS chapter really earns from these sales.  Use this old ...
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It's Girl Scout cookie time again!
Wanna work for Uber?
Students examine the ads and decide what is and isn't said. Do the ads give enough information to make a decision? Which is the better deal? How do you know? ...
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Wanna work for Uber?
Three wrapping presents activities
3 activities about wrapping presents: On the diagonal, 3-act by estimation with iPhone, and judging sizes and needs by estimation with man and shopping basket ...
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Three wrapping presents activities
Star Wars … the story continues
The Rise of Skywalker will open on December 20, 2019.  How much did it cost to make?  How much will it gross? Is the Star Wars phenomena a guarantee for success? ...
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Star Wars ...  the story continues
Shipping crunch
Do huge numbers of packages shipped and huge numbers of packages delivered late mean that these two companies aren't doing a good job? Talk numbers ...
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Shipping crunch
How many feet of lights should I buy for my tree?
Check out our Christmas Tree.  We need to buy lights for the tree.  Without calculating, guess how many feet of lights you will need. What information do you need to ...
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How many feet of lights should I buy for my tree?
The Forever Roll
Why would anyone need such a big roll of toilet paper?  How does it compare to Charmin's other toilet paper products? If this roll lasts for one month, how big ...
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The Forever Roll
How should I cook my turkey?
Bake it, deep fry it or barbecue it? When do I have to wake up to begin preparations? How long will the cooking take?  How much will it cost?  How many ...
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How should I cook my turkey?
Macy’s has some new balloons
These giant beauties can be measured in handler height, taxi cab widths, stories tall, and bicycle lengths.  What does that all mean?  How big are these balloons. The activity: Macy'sNewBalloons.pdf ...
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Macy's has some new balloons
How many Smashburgers?
There must be a million ways to craft one of these burgers. How many ways do you think that there are? ...
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How many Smashburgers?
Eliud Kipchoge runs marathon in 1:59:40.2
How have record marathon runs changed through the years?  Will those record times keep being broken?  Does the data help you predict? ...
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Eliud Kipchoge runs marathon in 1:59:40.2
Weird happenings at the end of daylight saving time
Strange happenings when one neighborhood observes daylight saving time and one neighborhood doesn't. Do you get confused? Does UTC notation help? ...
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Weird happenings at the end of daylight saving time
Operation Gratitude – Halloween candy buy back
This is a great idea! Motivate kids to get rid of all of that candy for a good cause. Operation Gratitude and dentists are encouraging healthy eating, motivated giving, and ...
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Operation Gratitude – Halloween candy buy back
How long will it take you to trick-or-treat?
It's Halloween and this is your neighborhood. How long will it take you to trick or treat at every house in your neighborhood? Possible conversation with students: How long will ...
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How long will it take you to trick-or-treat?
Ghost Whisperer
As the Halloween season begins, let your students play a spooky game. How does this work? Students can play this game online at Ghost Whisperer Crystal Ball and then Figure out why ...
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Ghost Whisperer
How Much Halloween Candy Will You Collect?
Students consider how to determine the best candy haul prediction.  The math ideas of measurement error and percent error are introduced.  Students then predict their own Halloween candy collections numbers ...
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How Much Halloween Candy Will You Collect?
Make a costume from a sheet
I'm going to make a costume pattern to sell.  People can buy my plan and make awesome, long, full, scary, ghost costumes.  This scheme will be so simple.  Perhaps I'll ...
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Make a costume from a sheet
How much should the 40-oz size cost?
We found this chalkboard menu at a coffee shop recently. The shop had prices for the 12-oz (small), 16-oz (medium) and 20-ounce (large) cappuccinos.  And they will also make you ...
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How much should the 40-oz size cost?
Largest coffee, new world record
The world record for the largest cup of coffee was recently set (see picture above).  In this activity students explore scale, similar figures, volume and measurement as they estimate the ...
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Largest coffee, new world record
15 NFL Math activities!
Do teams that spend a lot win a lot?  -  Students compare team wins with team salaries in the four major North American sports ... the NBA, NFL, MLB and NHL ...
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15 NFL Math activities!
Climate justice – 14 activities
Last week millions of people marched in hundreds of countries worldwide to demand "climate justice". Greta Thunberg speaking at World Economic Forum 2018 Choose from any of our 14 activities ...
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Climate justice - 14 activities
When will he use up his chocolate milk account?
Brian's son buys chocolate milk every few days to go with his lunch. His school creates an invoice that they send to parents every month that show the status of ...
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When will he use up his chocolate milk account?
Drill bit fractions
Act One:  Drill bits are measured by the diameter of the bit in inches. The drill bits below are ordered left to right in increasing size. The numerators in the ...
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Drill bit fractions
Does it pay to get educated?
Updated! Why should students do well in school, graduate high school, or go on to college?  In this activity median earnings by various education levels are explored.  Students compare the ...
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Does it pay to get educated?
So just print some more money!
What's the big deal with our deficit? Do we actually borrow money to cover our debt? If we do, imagine the interest charges? Help your students (and their families) understand ...
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So just print some more money!
Hurricanes 2019
The official Atlantic hurricane season started on June 1 and doesn’t end until November 30th. Now Hurricane Dorian is approaching the East Coast. Encourage your students to join the conversation, knowledgeably, by ...
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Hurricanes 2019
Who’s going back to school?
Updated! Students look at the past and present populations of the U.S. and the past and present population of school attendees to calculate the percentage of the population that are ...
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Who's going back to school?
Stacking Jack
Act One: Check out the video slide show.  What questions do you have? The Activity: Stacking Jack Suggested Question: How many different ways can I stack Jack?  That is, how many ...
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Stacking Jack
What’s the answer?
Math doesn't usually create a buzz on Twitter.  This past week this post did just that.  People argued online about whether the answer was 16 or 1 and proceeded to ...
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What's the answer?
Are original movies better than their sequels?
We've gathered some data on movie ratings and their sequels and asked students to analyze the data, decide on some analysis and debate (with their mathematical data) which are better ...
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Are original movies better than their sequels?
Bears Ears revisited
There is some beautiful land in Utah that was changed last year from federally protected land to Utah overseen land.  The buttes of Bears Ears (shown above) and the surrounding ...
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Bears Ears revisited
Point of view
If you have a set of cubes for your classroom, this would make a great group hands-on project. Its an old puzzle but the activity deserves a revisit. Below are ...
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Point of view
Louisiana
We recently watched the approach of Hurricane Barry and worried about the fate of Louisiana. After the devastation of Hurricane Katrina, what would another powerful hurricane do to this fragile ...
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Louisiana
All-you-can-eat ice cream … 10 cents!
All the ice cream that you can eat for only 10 cents!  Wow, that's a great deal!  How great a deal was that? The history of the Dairy Queen franchise ...
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All-you-can-eat ice cream ... 10 cents!
How can Nike give away so much great stuff?
Worldwide Nike supports many teams and athletes.  They design, manufacture, and supply gear for almost every sport imaginable. How much are those give-aways worth?  Is the company going to go ...
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How can Nike give away so much great stuff?
How much pee is in this pool?
After chlorination, it has been hard to measure the quantity of pollutants in pool water.  A Canadian chemist, Xing-Fang Li, has found a marker for urine that chlorine doesn't disguise. In ...
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How much pee is in this pool?
Spiraling squares – compass and straight edge
Can you see the many spirals in this design? Students calculate the size of each increasing round of squares and consider what sort of spirals these must be. The activity: ...
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Spiraling squares - compass and straight edge
How many baseballs are in this truck?
To see this poster larger in a new window, click on the image. In 2017, Old Dominion Freight Line offered 2 free tickets to the next 3 World Series to ...
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How many baseballs are in this truck?
NHL Playoff games can sure last a long time!
Revised! We're watching another Stanley Cup playoff now. Will there be any really long games during the playoffs? In 2013, a Stanley Cup playoff match between the Bruins and Blackhawks ...
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NHL Playoff games can sure last a long time!
Tornadoes 2019
Tornadoes have devastated the Midwest, U.S. in the last few days. Alabama, Texas, Louisiana, Oklahoma, Ohio, Missouri, Iowa, Nebraska and Mississippi have been brutally hit with these powerful events. Involve ...
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Tornadoes 2019
Wow, everything must be free!
What happens when you take 50% off again after taking 50% off at first? Students examine this retailer trick of giving double discounts.  What happens to the price when you ...
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Wow, everything must be free!
Opening Weekend – Avengers: Endgame
Can you tell from its opening weekend how much the new movie, Avengers: Endgame, might earn in theaters?  This activity can be used anytime and is especially timely when there ...
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Opening Weekend - Avengers: Endgame
Patriots Day, Tax Day, and the Boston Marathon
So much is happening on April 15th this year! As families and the news talk about filing taxes on time, it might be an excellent time to deal with where that ...
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Patriots Day, Tax Day, and the Boston Marathon
How long would it take to build this underground house and pool?
The building of this underground house and pool was presented by Cayote Person and his partner, Mark Lavins, on their youtube channel, "Brave Wilderness." At BraveWilderness.com the business partners post animal ...
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How long would it take to build this underground house and pool?
Are baseball games getting longer?
March 28th was opening day for this year's Major League Baseball season. It's a good time for some Major League Baseball math! In this activity students think about how major ...
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Are baseball games getting longer?
Big bucks
Mike Trout just signed a huge contract.  He'll be receiving $430 million dollars playing for 12 years with the Los Angeles Angels.  Let's take a look at some of the ...
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Big bucks
Huge Key Lime pie
More for π Day!  On a cold and snowy day in Boston, two chefs created a huge Key Lime pie to remind the frozen people of the Northeast how ...
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Huge Key Lime pie
How big of a crepe can you make?
At Costco you can buy this huge tub of nutella.  It contains nearly 7 pounds of chocolaty-hazelnut spread. We use nutella to make banana/nutella crepes.  How long will that tub ...
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How big of a crepe can you make?
Value of a lifetime of Whoppers?
Locked in a smelly bathroom for one hour and then promised a lifetime of Whopper meals, an Oregon man sued BK when the manager's promise was withdrawn. How much money ...
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Value of a lifetime of Whoppers?
President’s Pay for Presidents’ Day
The President's have only received a pay increase 5 times in the United States. Picture it with a step graph. Calculate the actual salary using the CPI (Consumer Price Index) ...
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President's Pay for Presidents' Day
Pythagorean Triples and coloring
Pythagorean triples are not only handy for students to recognize but produce some interesting and lovely patterns.  We've combined a little coloring with our Pythagorean Triple pattern investigation to let ...
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Pythagorean Triples and coloring
Choosing the NBA All-Star team
Updated for 2020!     The weekend of February 14 - 16 will be all about the NBA All-Stars. The two team captains are Giannis Antetokounmpo (Milwaukee Bucks) and LeBron James (Los Angeles ...
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Choosing the NBA All-Star team
V-o-r-t-e-x
Use the extreme cold weather to practice and understand integer subtraction ...
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V-o-r-t-e-x
Two 12s or one 18?
Which should we order and why? Two 12-inch pizzas or one 18-inch pizza?  Which will give you more pizza? More crust? Which is the better deal?  Let's do the math! ...
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Two 12s or one 18?
Checking in on LeBron
Now the that season is underway let’s check in on how Cleveland and the Lakers are doing since LeBron changed teams.  LeBron is arguably the best player in the NBA ...
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Checking in on LeBron
Huge diamond found in Canada
552-carat diamond found in Diavik Mine, Northwest Territories, Canada Can you tell just how big this gem is?  Do you know how big a carat is? What would this look ...
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Huge diamond found in Canada
New Horizons spacecraft just flew by a really distant asteroid
On January 1st, 2019, the New Horizons spacecraft passed close to Ultima Thule, a Kuiper Belt object that's a billion miles beyond Pluto. That milestone marked the most distant celestial ...
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New Horizons spacecraft just flew by a really distant asteroid
Wrapping presents on the diagonal
In this activity students determine if this method for minimizing wrapping paper is actually more efficient then the traditional method. For a hands on learning experiment, have students actually wrap ...
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Wrapping presents on the diagonal
Digesting a Lego head
If you know the mean of data what does that tell you about the data's total ... with poop and a Lego head ...
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Digesting a Lego head
Moneymaking holiday movies
Which movie do you think is the highest grossing holiday movie of all time? Students analyze holiday movie data. They will round, estimate, compare, calculate percent increase, consider the most ...
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Moneymaking holiday movies
Do I have enough wrapping paper?
I have to wrap this box.         In this problem based activity students first guess and then try to calculate whether they will have enough paper to wrap ...
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Do I have enough wrapping paper?
Weird wing prices
Clicking on this image will show it larger in a new window. Danny's Wok in Philadelphia has a huge price list for ordering their famous chicken wings. Why did they ...
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Weird wing prices
Macy’s Thanksgiving Parade 2019
 As we get ready for next week's holiday, students can study a map of the annual Macy's Thanksgiving Day parade, describe, measure and hypothesize why this route was chosen ...
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Macy's Thanksgiving Parade 2019
Fine
TJ Watt was fined for roughing the passer.  Check out the tweet from Darren Rovell and engage your students in a familiar context for a classic percent problem - solving ...
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Fine
Consumer spending 2018
Consumers in the U.S. spend a lot of money. In this activity we look at historical data to see if there are any patterns in our spending.  How does our ...
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Consumer spending 2018
Veterans Day 2018
As Veterans Day approaches, let your students learn about and appreciate the meaning of the day by analyzing the powerful data that we’ve supplied. Students can use our numbers to create questions ...
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Veterans Day 2018
How huge could this mid-term election be?
Will November 6th election bring record number of voters to the polls? Students get a chance to understand what the usual percentage of voters is, look for trends and central ...
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How huge could this mid-term election be?
Extra point or 2-point conversion – Updated
 In 2015 the NFL changed the extra point kick distance to 33 yards and now teams have a tough decision to make, go for one or two points?  The ...
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Extra point or 2-point conversion - Updated
Columbus’s progression across the Atlantic
The Niña Columbus Day is a bit of an enigma that used to be celebrated throughout all of the Americas. Indigenous people were not treated well by the European colonization ...
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Columbus's progression across the Atlantic
Fantasy Football
In the midst of another NFL season, we introduce students to Fantasy Football. Students first calculate football points given touchdowns, yardage gains and interceptions. They are then challenged to generalize ...
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Fantasy Football
Sol LeWitt’s pyramid – How might you count those blocks?
Sol LeWitt (1928 - 2007) was a an American artist involved in Conceptual art and Minimalism.  This structure is housed in the garden of the Hirshhorn Museum on the National ...
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Sol LeWitt's pyramid - How might you count those blocks?
Nike’s latest bet
Nike has just chosen a surprising person to represent the 30th anniversary of their slogan, "Just Do It".  Colin Kaepernick, past quarterback of the San Francisco 49ers, has been a ...
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Nike's latest bet
Justin Verlander’s hugely expensive lunch
Check out Justin Verlander's luncheon bill. What do you notice? What do you wonder? Students might be interested in or impressed by what a $1 million dollar charge does to ...
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Justin Verlander's hugely expensive lunch
But it didn’t sell?
 A&W offered a bigger, tastier burger but it didn't succeed in grabbing customers away from the hugely popular McDonald's quarter pounder. The A&W third pounder hamburger cost the same ...
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But it didn't sell?
Madden Glitch
It's the talk of the town. Madden video games have had some issues. Check this one out. Here's one that has Le'Veon Bell seeming to fly from the Bear's goal ...
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Madden Glitch
“Wild Boars” soccer team rescue – Incredible
Can you imagine being stuck in the dark for such a long time?  How do all of the numbers play out? In this activity, students get a chance to talk ...
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"Wild Boars" soccer team rescue - Incredible
Now that LeBron James is becoming an L. A. Laker, will this company go broke?
Fanatics is an online sportswear retailer that has promised to accept jersey returns if your chosen player makes a team switch. In this activity student try to calculate how much ...
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Now that LeBron James is becoming an L. A. Laker, will this company go broke?
World Cup – How many ways?
How many games are played in each round of the World Cup?  In the opening round each of the four teams in a group must play each other (round robin ...
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World Cup - How many ways?
Encouraging bats might be better than using bug repellant
Bats eat mosquitoes ... lots of mosquitoes. Students compare a bat's weight to how much he can consume in one night.  They calculate how much they would need to eat ...
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Encouraging bats might be better than using bug repellant
World Cup draw
This is part II of our reflections on the World Cup games.  Part I, World Cup rankings, explained and let students practice with the formula and weighting that is used ...
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World Cup draw
Fibonacci coloring
Let your students simply enjoy coloring our designs or artistically play with the whole creation of Φ designs. Simply coloring our Fibonacci patterns might allow students to ponder the Fibonacci ...
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Fibonacci coloring
World Cup rankings
In December soccer teams with the strongest world rankings were chosen to play in the once-every-4-years World Cup. The World Cup competition has just begun and will continue through July ...
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World Cup rankings
Impress your parents at dinner
This activity is the first in our series on mental math tricks.  Let your students develop their own individual way of mentally multiplying by 0.5, 5, 50, 500, and so ...
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Impress your parents at dinner
What are the odds that Justify can win the Triple Crown?
Justify has won the Triple Crown.  He's the 13th horse to ever win all three races ... Kentucky Derby, Preakness, and the Belmont Stakes.  Amazing! How do you calculate compound ...
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What are the odds that <em>Justify</em> can win the Triple Crown?
Will Damarious Randall have to pay big?
Warriors won the NBA Championships.  Randall won't have to buy jerseys! The Cleveland Brown's safety player, Damarious Randall, posted this tweet.  Its been very popular and retweeted a lot.  How ...
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Will Damarious Randall have to pay big?
More eruptions on Hawai’i’s Kilauea
The Volcano Kilauea is continuing to spew molten lava and ash on the island of Hawai'i. This volcano is on the tip of the southern most Hawaiian Island.  Is that ...
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More eruptions on Hawai'i's Kilauea
Prince Harry and Meghan Markel’s Royal Wedding
This weekend is the wedding of Prince Harry and Meghan Markel. This will be quite an event and we can expect it to dominate the media.  What have you heard ...
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Prince Harry and Meghan Markel's Royal Wedding
Triple Crown hopeful at the Preakness Stakes
Justify won the Preakness - Can he win the Triple Crown? This past Saturday was the running of the Preakness Stakes Thoroughbred horse race in Baltimore, Maryland.  The Preakness is ...
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Triple Crown hopeful at the Preakness Stakes
Who had the greatest NBA season ever?
Updated for 2019! In 2017 Russel Westbrook had one of the most dominating seasons ever, averaging a trip!e double per game.  James Harden lit up the league in 2018 and ...
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Who had the greatest NBA season ever?
Boeing 787 draws an airplane over the United States
Recently, pilots of a Boeing 787 testing a new set of Rolls Royce engines, fulfilled their FAA required long-distance endurance requirement in an unusual way. The Boeing pilots decided to have ...
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Boeing 787 draws an airplane over the United States
Where should I drop my puck?
Act 1 - Give students time to view the game board above or give them our one-page activity. The above picture is larger when you click on it. Ask students ...
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Where should I drop my puck?
Wheel of Theodorus
Bring a little art into your math class as you begin to use the Pythagorean theorem and your students first meet irrational numbers ...
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Wheel of Theodorus
How fast can you run?
In preparation for the Boston Marathon, we thought that an analysis of running speeds might be appropriate.Have you heard of The Six Million Dollar Man?  He was the character in ...
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How fast can you run?
Jackie Robinson
April 15th, 1947 was a date to remember.  Jackie Robinson became the first African-American baseball player to play in Major League Baseball since the game was segregated in the 1890s ...
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Jackie Robinson
What me? Irrational?
We've found that some students believe that the approximation that their calculators show for irrational numbers is exact.  Here's an activity that you can advertise as long multiplication review. After ...
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What me?  Irrational?
Pizza party figuring
In this activity students decide how to divide 2 pizzas amongst 6 adults and 3 pizzas amongst 8 kids.  Fractional pizza parts need to be drawn and considerations discussed about ...
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Pizza party figuring
Hexadecimal coloring
Probably most of us have heard of and even used hexadecimal color codes. Don't you wonder why their number descriptions really make sense? In this activity we first ask students ...
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Hexadecimal coloring
Want to earn $150,000? – Mersenne prime search
What's a Mersenne prime?        How hard could it be to find the next one? Why are there only 50 known Mersenne primes?     What's with $150,000? ...
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Want to earn $150,000? - Mersenne prime search
Curling
Friction, score-keeping, trajectory and weirdness are the main concepts in this activity.  Curling is not a well-understood sport but the science and strategy are easily understood and enjoyed. Let your ...
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Curling
Olympic rankings
Check out the two images of the 2008 summer Olympic medal counts.  What do you notice? The Olympic Games are competitions between athletes in individual or team events and are ...
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Olympic rankings
Big Air snowboarding
Graphic generously supplied by GraphicNews.com Starting February 18th a new Olympic sport will be televised ... Big Air Snowboarding.  Some of your students may be officianados of snowboarding. Using this ...
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Big Air snowboarding
Super Bowl ads and scientific notation
Let your students revisit and reflect on the interesting commercials with this scientific notation activity. Students practice using scientific notation as they calculate the cost of Super Bowl commercials. After ...
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Super Bowl ads and scientific notation
Winter Olympics, PyeongChang: February 9 – 25
Scoring Ski jumping - The scoring rubric for each of the Olympic events is intended to eliminate the possibility of scoring bias from the judges. Let your students learn more about the ...
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Winter Olympics, PyeongChang: February 9 - 25
How many wings did the Bills send the Bengals?
On December 31st, 2017, the Cincinnati Bengals beat the Baltimore Ravens. The Ravens' loss clinched the Buffalo Bills' rise to the AFC playoffs.  The Bills sent a thank-you gift of ...
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How many wings did the Bills send the Bengals?
Greasing light poles
The Philadelphia police were being proactive about keeping their enthusiastic Eagles fans from being reckless as they celebrated their 2018 Super Bowl win.  So, the police departments frosted the city ...
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Greasing light poles
Cost of hosting Olympic games
Clicking on this image will show it larger in a new window. Hosting the Olympics sure does cost a lot. Why is that? How much money is $5 billion dollars? ...
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Cost of hosting Olympic games
The Olympic Torch trip in South Korea
On October 24, 2017, the Olympic flame was captured on Mount Olympus, Greece. (Lighting the Olympic Torch). That flame lit one of this year's Olympic Torches and the Torch relay ...
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The Olympic Torch trip in South Korea
Is this promo a good deal?
McDonald's was offering an "Arch Card" special deal. If you bought an Arch Card for $100 you were entitled to a free BigMac or EggMcMuffin every week for a full ...
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Is this promo a good deal?
Spiraling triples
Let students explore the patterns of perfect squares and Pythagorean Triples as they analyze our piece of art and decide why the resulting construction looks like spiraling squares. For a ...
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Spiraling triples
Is my son going to win … again?
My son's pretty young but is he still going to whoop me?  We were playing Monopoly Junior.  Can you decide who will win?  In this activity use addition and/or multiplication ...
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Is my son going to win ... again?
Hands of “Support”
Lorenzo Quinn, an Italian sculptor, created and temporarily installed this piece of art entitled "Support" in Venice.  Quinn used his own children's hands to design this piece.  His intention was ...
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Hands of "Support"
Holiday candy sales
Which holidays are associated with candy? For which of those holidays is the most candy sold? What percents of annual candy sales does each holiday contribute? Consider using some independent think ...
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Holiday candy sales
Population Clock
Click here to see the Population Clock bigger in a new window. How in the world does this clock conclude that there is a net gain in the United States ...
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Population Clock
Water saving toilets
How much water is used? How much water could be saved? The activity: PottyTime-SavingWater.pdf CCSS: 5.MD.1, 5.NBT.7, 6.RP.3, 7.RP.3, MP2 ...
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Water saving toilets
Immigration numbers
Here's an opportunity to work with calculating percents and the percent changes in the U.S. immigrant population. Students can reflect on what those changes demonstrate. Start your class with this ...
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Immigration numbers
Uh oh! Am I going to run out of data?
Let your students consider the graphic first individually and then in groups of your choosing before handing out the activity sheet. This might be an excellent beginnng-of-the-year, get-to-know-each-other task!  The ...
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Uh oh!  Am I going to run out of data?
Should I get the Big One?
 Let your students decide if the BIG one is a fair deal.  Click on the pic to enlarge and post on the wall.  Have kids pick a sandwich.  Which size ...
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Should I get the Big One?
Layla’s antibiotics
The dosage of Layla's medication was confusing to our friend Kim.  How many days was she supposed to give Layla the meds?  How many pills does she need to cut ...
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Layla's antibiotics
Will the new iPhone sales be huge?
Apple just announced their new, 10th anniversary, iPhones, the iPhone 8 and the iPhone X.  These phones will soon be in stores, the iPhone 8 comes out on September 22, ...
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Will the new iPhone sales be huge?
BIG Snickers bar
Wow!  This snickers bar is huge! Act 1 - Big question = How many times bigger than a regular Snickers bar is this? What info would you like to know? How ...
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BIG Snickers bar
How much does the biggest Lego set ever cost?
Note: This is a remake of our 2014 "How Much Does a Lego Cost" activity How much could the Lego Millennium Falcon cost? Student first make a guess and then ...
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How much does the biggest Lego set ever cost?
Total solar eclipse – apparent sizes
Where will the eclipse be seen?  What if you are not in the path of totality?  Total solar eclipse?  What is apparent size?  How can the moon seem to cover ...
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Total solar eclipse - apparent sizes
How many times bigger?
Listen to students initial thoughts as they wrestle through what "bigger" means ... length? height? wheel-base? volume? ...
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How many times bigger?
Willy Makit and Betty Wont
I have to go to the bathroom pretty badly. I have to admit that I have been holding it in for a while.  Finally!  I see a bathroom sign!  Wait ...
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Willy Makit and Betty Wont
Giant iceberg breaks off from Antarctica
The crack in Antarctica's Larson C ice shelf has been growing for years.  Has the speed of the rift's growth stayed about the same? increased? decreased?  Do the math and ...
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Giant iceberg breaks off from Antarctica
Drinks at the Fair
At the amusement park, our friend, Jason, was intrigued with this sign for drink deals. He and his family come often to the park and, during the summer when it ...
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Drinks at the Fair
Fireworks on your calculator
Let your students experiment with their graphing calculators to create a nice fireworks display?  We've written a brief activity that questions students about manipulating parabolas, adjusting their calculator windows, and helping them ...
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Fireworks on your calculator
How many cars are there?
I came home from work to find that my son had his cars organized in a tight parking lot on our front porch. How many cars are there? Is it ...
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How many cars are there?
Saving Water Bottles
In my grocery store they now have these new water bottle refilling stations. You can simply refill your own container with water instead of buying a six-pack of bottled water ...
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Saving Water Bottles
New Pirates of the Caribbean – How profitable?
The fifth Pirates of the Caribbean movie opened on Friday, May 26th. Your students might be looking forward to seeing this movie and motivated to understand the investment expenses and profit ...
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New Pirates of the Caribbean - How profitable?
Fidget spinners – fad or lasting trend?
Do you recognize what these are? Are you noticing students with these gadgets? Is this a forever toy or just the newest thing? Can you tell by looking at trend ...
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Fidget spinners - fad or lasting trend?
Proposed southern border wall
You have probably heard about the proposed border wall that may go up along the U.S./Mexico border.  How much wall needs to be built? How much will that cost? What ...
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Proposed southern border wall
A gorgeous, glittery Mother’s Day card
Uh oh!  How do you find the area of a heart? Get your students to help you calculate how many sequins you'll need to order for this mother's day class ...
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A gorgeous, glittery Mother's Day card
Measuring sea level
What does this gizmo do? We've given students a diagram of what the interior of this mechanism contains and asked them to try to decide what its purpose must be ...
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Measuring sea level
Giant iceberg
Over the past Easter weekend this giant iceberg drifted passed Ferryland, Newfoundland.  Its hard to tell how large it actually is but it looks huge.  Use some of the data ...
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Giant iceberg
Chicken to share
How many pieces does each person get when $10 is supposed to feed two people? ...
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Chicken to share
April’s calf was born!
At about 10:00 am, April 15th, April's calf was born.  Everyone will be talking about it and smiling constantly. Here's some fun math stuff to bring with you for Holiday ...
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April's calf was born!
Patriots’ Day
In Massachusetts, Monday April 15th, 2019, will be a holiday from school and work.  We celebrate Patriots' Day on the 3rd Monday in April to commemorate the beginning of the ...
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Patriots' Day
What does 95% confidence in the poll results mean?
There have been a lot of polls about who will win the Presidential election. I get so confused when polling results are reported.  What is a 95% confidence measure? What's ...
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What does 95% confidence in the poll results mean?
Alarming ice cracks on Brunt Ice Sheet in Antarctica
A new, fast-growing ice crack is forcing the Halley VI British research station in Antarctica (shown above) to be moved.  Fear of a huge break-off from the ice sheet is alarming ...
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Alarming ice cracks on Brunt Ice Sheet in Antarctica
New baby giraffe
Willow weighed 125 pounds at birth and was 6 feet 1 inch tall.  She will grow to her adult height of around 14 feet tall in only four years! How ...
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New baby giraffe
How did I graph this heart?
What equations did I use to make this beauty? algebraic-heart CCSS: 8.EE, 8.F, HSA, HSG ...
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How did I graph this heart?
Have a heart
Clicking on the image above will show the heart larger in a new window.Canstruction® is an event hosted in more than 150 countries throughout the world to demonstrate "innovation, hunger relief  ...
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Have a heart
Chocolate heart-shaped raspberry cake
Students calculate base area or volume of cakes made from 2 cake pan sizes and observe how the volume of the cake changes with the increased pan size.  This is ...
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Chocolate heart-shaped raspberry cake
Super Bowl cheesy pretzel poppers
... A little more delicious work for the Super Bowl.  Students follow a recipe that involves "cutting the cheese" block, figuring how many servings, estimating how many times they need to ...
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Super Bowl cheesy pretzel poppers
Getting a new iPhone – which plan should I choose?
I want to get an iPhone8 and maybe change my service plan.  Which of the above plans should I choose? Student pick one plan and consider the cost of the phone and ...
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Getting a new iPhone - which plan should I choose?
Civil rights marches, how do you count a crowd?
On October 16, 1995, perhaps a million black men gathered for the Million Man March on Washington.  This was 32 years after Martin Luther King, Jr. gave his historic "I have ...
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Civil rights marches, how do you count a crowd?
Home team advantage?
Even before your students check out the graphic below, ask them whether they think a game played at home gives their team an advantage.  If so, how much of an ...
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Home team advantage?
It’s latke time
In my family it is traditional to eat latkes (Yiddish for potato pancakes) at this time of year.  They are fried in a lot of oil and salted generously.  My ...
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It's latke time
What’s wrong with this picture?
We've gotten used to believing what we read or see advertised.  But sometimes the clerk doesn't get the sales discount right or something seems a little off.  Let students ponder ...
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What's wrong with this picture?
Giant macaroon nutcracker, revisited
Each year the Boston Ballet highlights the holiday season with the Nutcracker ballet.  In 2014, the Boston Ritz Carlton Hotel's chef, Andrew Yeo and his pastry team, created a gorgeous and ...
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Giant macaroon nutcracker, revisited
Pick-a-brick wall at the Lego store
There are walls at the Lego stores that are filled with individual Lego parts.  You can fill a bucket and pick out exactly what you need. Use this PowerPoint activity ...
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Pick-a-brick wall at the Lego store
$10,000 a week or $10 million all at once?
Check out the video below: Would you rather have $10,000 a week or $10 million all at once? What kinds of things do we need to think about or factor ...
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$10,000 a week or $10 million all at once?
Fantastic Beasts – What did it cost to make?
In 2001, J.K.Rowling (the author of the Harry Potter series) wrote Fantastic Beasts and Where to Find Them. The movie of this book opened on November 18th, 2016.  This is the ...
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Fantastic Beasts - What did it cost to make?
Shrinking Toblerone
They changed it.  That is so not fair ... or is it? You can check out a video news story on the delicious shrinking Toblerone bar here. Two sizes of ...
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Shrinking Toblerone
3 winners on the Price is Right – what are the chances?
Act One: Show this clip of the recent Price is Right program.  What questions do your students have? We were wondering what the chances are of 3 contestants in a ...
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3 winners on the Price is Right - what are the chances?
Cubs bury curse !
Wow!  It's been a long time coming.  The Chicago Cubs just won the World Series! The last time they won the World Series was in 1908 (For some perspective, that ...
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Cubs bury curse !
Cheap-otle?
One of my favorite foods is a burrito.  One of my favorite places to get a burrito is Chipotle.  Their food is delicious and environmentally friendly. For Halloween 2016, Chipotle ran ...
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Cheap-otle?
Big Papi
Check out the video: What do you wonder? How many donuts make up this Big Papi tribute? What would be useful to help you figure this out? The following pictures ...
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Big Papi
Are these really 70% off?
We ran into this sale online. Is that advertisement correct?  Do they just want us to believe their math and not question what is really 70% off?  Is everything or ...
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Are these really 70% off?
Pascal’s Triangle coloring and Probability
Working with Pascal's Triangle offers some interesting and varied mathematics.  We love to color and the end results are prettier than most math homeworks.  Here is the second of 3 ...
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Pascal's Triangle coloring and Probability
Another year of Never Ending Pasta
On September 15, 2016, Olive Garden again offered a $100 pass for never-ending pasta, bread sticks, salad and coca cola soft drinks.  The 21,000 patrons who quickly (in less than ...
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Another year of Never Ending Pasta
Which of the Olympic sports do you want to watch?
Develop some understanding of the many Olympic sports and their various judging requirements.  Should the Olympics only include performances that can be objectively measured? ...
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Which of the Olympic sports do you want to watch?
Pokémon GO! I should have invested
Pokémon GO is all the rage.  News reports show people glued to their smart phones as they travel to nearby landmarks where virtual critters appear and need to be caught ...
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Pokémon GO!  I should have invested
10 Million nematodes
Grubs are killing my grass.  I don't want to put poison into the ground.  What can I do? There are tiny roundworms called beneficial nematodes. They can kill destructive soil ...
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10 Million nematodes
How high can a gymnastic score be?
Updated for 2021! Gymnasts have just successfully competed in St Louis, Missouri for positions on the USA Olympic team.  As you watch their performances don't you wonder how their scores are ...
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How high can a gymnastic score be?
Lighting the Olympic Torch
The 2020 Olympic Torch was lit in Olympia, Greece on March 12, 2020.  Because of the world-wide pandemic, the relay was paused and the lit Torch was safe-guarded during the ...
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Lighting the Olympic Torch
Coloring with Pascal’s Triangle … Binomial expansion
Working with Pascal's Triangle offers some interesting and varied mathematics.  We love to color and the end result is pretty!  Here is the first of 3 activities using Pascal's coloring ...
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Coloring with Pascal's Triangle ... Binomial expansion
Which is most expensive?
Who knew that creams for your face could be so expensive!  I'm going to have to rethink what to buy for my mom.  Which of these high priced cremes is ...
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Which is most expensive?
Games with dice
Time to let students become naturally curious about probability.  In this activity students work in teams to record the frequency of rolled dice combinations. They observe the difference between experimental ...
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Games with dice
Leicester City Foxes – from underdogs to Champions
Recently, to the surprise and elation of England and the world, the Leicester City Foxes became the winners of the British football association's Premier League.  What was the big deal? ...
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Leicester City Foxes - from underdogs to Champions
Flag Art
A little ratio art might be a fun way to get ready for the upcoming Memorial Day holiday.  In this activity students measure; create whole number ratios for the official ...
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Flag Art
Pixar versus DreamWorks
Animated films are a billion dollar industry.  The two biggest producers of animated films are DreamWorks and Pixar.  The two have been going head to head for more than ten ...
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Pixar versus DreamWorks
How long until they collide?
Show the beginning of the video. Stop the video at about 39 seconds. Take guesses from students. After students have worked for a while and you have traveled around and selected ...
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How long until they collide?
Should I replace my toilets?
I'm trying to be more savy about wasting our resources.  I have really old fashioned toilets and I'm trying to figure out if I should invest in saving water.  Can ...
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Should I replace my toilets?
Double Discount
  Wow, check out this sale!  I'm gonna be able to get this great hoodie so cheap!   If I use the promo code what will be the total percent ...
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Double Discount
Will college be affordable?
Whether you or one of your siblings is going off to college next fall, it is useful to know how much colleges cost.  Not going to college this fall? No ...
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Will college be affordable?
How did they figure these tips?
Act I:  This restaurant bill has the suggested tips, but they are smudged out.  What should they be?  Consider having students make a fast 5 to 10 -second prediction in ...
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How did they figure these tips?
What’s my angle?
I'm going to help save the planet by adding solar panels to my roof! Should I tilt the panels on my roof to more accurately aim towards the Sun? If ...
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What's my angle?
The Boston Marathon
Monday, April 15, 2019 Patriot's Day, is the next running of the Boston Marathon. What do you know about marathons? What do you know about the Boston Marathon? How long ...
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The Boston Marathon
David Price, big bucks per …
David Price, a 30-year old pitcher from Toronto's Blue Jays, was hired with a 7 year contract to be the Red Sox's new ace pitcher for $217 million dollars.  That ...
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David Price, big bucks per ...
Figuring planting dates
It's time to get ready to plant my garden again.  But here in Boston we have to start our seeds indoors to give them a head start before we can ...
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Figuring planting dates
Which is the best deal?
How do you calculate and justify which deal is a better savings?  By dollars saved?  By percent saved? By some other measure? The activity: WhichDealOffersMostValue.pdf CCSS: 4.OA, 4.NBT, 4.MD.A, 5.NBT, 6.RP, ...
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Which is the best deal?
How much do the tickets cost?
Ooops! I was supposed to buy 4 adult and 2 children tickets, but I accidentally entered four children and two adults ... 🙂 Can you figure out how much a ...
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How much do the tickets cost?
Giant chocolate bunnies
Topper Chocolate Easter Bunny from Dilettante Chocolates. What can you deduce about the bunnies (pictured in this activity) from the descriptions given ... solid? hollow? cost per pound? cost per height? ...
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Giant chocolate bunnies
“Go” in the news – man versus machine
March 9th was the first round of the competition between Lee Se-dol, one of the World's best Go players, and Google's artificial intelligence program "AlphaGo".  The first and second matches ...
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"Go" in the news - man versus machine
How much did the temperature change in Boston?
It's been a crazy winter of extremes through much of the United States. Here's an article, from the February 17, 2016 Boston Globe Newspaper by Matt Rochereau, with the degree ...
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How much did the temperature change in Boston?
Who can play in this play area?
We visited a Chic-fil-A recently.  We had a great meal and my son loved playing in the play area.  While at the play area I noticed two different signs that ...
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Who can play in this play area?
Data on the National Mall sites
Activity #1 - Look at the individuals who are memorialized on the National Mall and using fractions or percents decide what you can notice about those we honor. The Activity: MLKandMonuments.pdf ...
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Data on the National Mall sites
Timelines for the life and work of Martin Luther King
Monday will be the holiday celebrating the life and work of Martin Luther King, Jr.  Help students learn about his work towards racial equality as they create one or two ...
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Timelines for the life and work of Martin Luther King
How Many Pennies did Otha Save?
Otha Anders used picking up pennies as a way to remember to pray.  In this 3-act activity we try to estimate how much he actually collected and stored in 5 ...
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How Many Pennies did Otha Save?
Mark Zuckerberg and Priscilla Chan to give away 99% of their shares of Facebook
That sounds like an awful lot of their Facebook shares.  They want to help create a better world for their daughter, Max. I wonder if they will have enough left ...
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Mark Zuckerberg and Priscilla Chan to give away 99% of their shares of Facebook
Rescue of the Chilean miners – The 33
On August 5, 2010, the San Jose copper-gold mine near Copiapó,Chile collapsed stranding 33 miners in a large cavern more than 2,000 feet below ground. A new movie has just ...
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Rescue of the Chilean miners - The 33
Glowing rectangles
People spend lots of time staring at their screens (glowing rectangles).  Kids spend hours each day using their cell phones, computers, tablets, television and more.  Use that interest to motivate ...
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Glowing rectangles
Free Pizza for a Whole Stadium?
Act One: Clemson Football Head Coach, Dabo Swinney, offered an amazing "poll party" with pizza for everyone if Clemson makes the College Football Playoffs in the last poll of the ...
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Free Pizza for a Whole Stadium?
What’s your favorite sport?
What is your favorite sport?  Wait, do I mean your favorite sport to play or your favorite sport to watch? Does it matter? Are your favorite to-watch sport and your ...
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What's your favorite sport?
How much have doughnuts changed?
Students learn the reasonableness of the torus volume formula and use it to analyze how donuts have changed ...
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How much have doughnuts changed?
Going bananas
What additional information would you like to know? Record your data from your investigation ... either from your own research or from what your teacher can supply. Use all the information ...
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Going bananas
Oreo Stuffiness
There is yet another Oreo... This activity builds off the work that Dan Anderson's math class revealed about Original Oreos and Double Stuff Oreos. Students begin by working with the ...
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Oreo Stuffiness
How much can my DVR record?
How many hours of HD video can my DVR strore? How about SD video? I love my DVR.  I can record my shows and movies and watch them whenever I ...
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How much can my DVR record?
How Much is a Tweet Worth?
These days it seems everyone is on social media. Are you? Famous athletes and entertainers are on social media and they can make a lot of money.  In this activity students ...
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How Much is a Tweet Worth?
In the Cloud
I want to find a way to keep my photos, documents, videos and music in a place that is safer than on my computer.  If my Macbook Air melts, where ...
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In the Cloud
Free Flights?
This can't be right!  If my flight cost $200 and I stayed for 10 days it would be free.  Right?  You can kick off this activity by asking students to think ...
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Free Flights?
New Horizons spacecraft observes Pluto
The New Horizon space probe was launched from Cape Canaveral on January 19, 2006. It has now come close to Pluto and has sent its first close-up images back to Earth ...
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New Horizons spacecraft observes Pluto
Jock tax
Great professional athletes make a lot of money. In November slugger Giancarlo Stanton signed a thirteen year contract for over $325 million with the Miami Marlins!  Did you know that professional ...
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Jock tax
What’s with the plovers?
Cute little birds.  Piping plovers are presently nesting on beaches along the Atlantic coast. Consequently beaches are often roped-off or closed to protect their nests and chicks.  Is this conservation ...
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What's with the plovers?
Thank you, mother and father, for all of those diapers
Thank you Mother and Father for all of those diapers - Which is a better deal, cloth or disposable diapers?  How much did you cost your parents in diapers?  In the ...
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Thank you, mother and father, for all of those diapers
How Old Are You?
We usually give our ages in years, but that isn't very precise is it?  In this activity students find their age in days, hours and minutes.  First students take two ...
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How Old Are You?
Big Burger
In honor of International Hamburger Day (May 28, 2015), it's time to treat your students to ratios, proportions, fractions and BIG BURGERS! In this activity students explore the ratio of ...
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Big Burger
Triple Crown possibilities, 2015
Updated for 2017! American Pharaoh was the first horse to win not only the Triple Crown but also the Breeder's Cup race = Grand Slam!  Never done before. Involve your ...
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Triple Crown possibilities, 2015
How Many Donuts is That?
Act One:  Take a look at the picture.  What is the first question that comes to mind? How many donuts is that?  What information would be useful? Act Two: See ...
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How Many Donuts is That?
Growth of Facebook update
Facebook is so accepted in our world today that it is even part of nightly news broadcasts as people are noted for receiving huge numbers of likes in appreciation or ...
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Growth of Facebook update
California water measurements – chains, links, and furlongs
Help your students understand what they are reading or hearing about the California drought.  Terms like acre-feet, chains, and furlongs are often used to describe the volume of the reservoirs ...
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California water measurements - chains, links, and furlongs
McDonalds moves towards antibiotic-free chicken
Recently McDonald's announced that by 2016 they will use only chicken raised without the antibiotics that are used in human medicine.  McDonald's plans to join Chick-fil-A, Panera Bread, Chiptotle, and ...
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McDonalds moves towards antibiotic-free chicken
Can you predict the Bears’ 2015 schedule and win big?
This year, the Chicago Bears have created a schedule-predicting contest with the prize being two tickets to all 16 home and away games. Plus air fare and lodging for the ...
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Can you predict the Bears' 2015 schedule and win big?
Passover macaroons
Passover begins this year on Friday evening, March 27th, 2021, with a Passover seder dinner. Passover is one of the three high holidays in the Jewish religion and celebrates the ...
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Passover macaroons
Movie tickets over time
How Much Will Movie Tickets Cost in the Future? - Updated! In this investigation, Brian looks at the changes in movie ticket prices over the last 38 years. Using his scatter plot ...
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Movie tickets over time
Chili Con Queso
Act 1: Take a look at the promo at Moe's.  What is the first question that comes to mind? How much does a 42-gallon jug of Chili Con Queso cost?  How ...
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Chili Con Queso
2015 World Cup Cricket
The Cricket World Cup is being played now in Australia and New Zealand.  This is a complex game that seems to be played with enthusiasm and humor.  In this activity ...
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2015 World Cup Cricket
Which Sweet Hearts are the Best Deal?
 I have been doing a little shopping for Sweet Heart Candies. I came across these three deals online.  Which should I select?  In this activity students determine which package of ...
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Which Sweet Hearts are the Best Deal?
A parametric heart … with love
Students use parametric equations and simple trig functions (using unit triangles) to create a really nice heart. https://www.yummymath.com/2015/a-parametric-heart-with-love/ HSG.SRT, HSF.TF ...
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A parametric heart ... with love
Clean Close Shave
Take a look at the infographic.  What do you see? What do you think?  What do you wonder? In this lesson students compare NFL QB rating of quarterbacks with and without ...
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Clean Close Shave
Deflategate
The deflated ball controversy makes an interesting segue into negative number line understanding.  A particular digital psi football gauge reads 0 when the ball is at a proper NFL inflation of ...
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Deflategate
Do you have text neck?
What does looking down at your electronic device do to your breathing? To your muscles? To your spine curvature? To your pain?  It can lead to a condition called Text ...
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Do you have text neck?
Cost of a gallon of gas
In 1950, one gallon of gasoline costs $0.27.  Today the prices are going down but are they as low as they were in 1950?  Or could $0.27 buy more in ...
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Cost of a gallon of gas
Losing team in the playoffs, 2015
Hey, the playoffs are about to begin.  The best teams from the leagues compete to determine the champion. Must be some really great teams! But wait, the 2014-15 Carolina Panthers made ...
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Losing team in the playoffs, 2015
How much does a Lego cost?
This is a three act task, with an activity guide.  Show students the act one video.  What questions do they have?  How much could the Star Wars kit cost?  Follow ...
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How much does a Lego cost?
Rush or Pass?
With only 16 games in an NFL regular season every game and every play is crucial.  Teams need to win each week or jobs are on the line. To win ...
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Rush or Pass?
Delicious pumpkin pie
I make the best, best, really best pie. Every year more and more people come to our house on Thanksgiving morning for my famous pumpkin pie and a hike in ...
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