Algebra

These posts help students see patterns and relationships.

Boston Marathon

That’s Jerry, my nephew, waving. Monday, April 21, 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 do you think the marathon is?…

Recent Earthquakes

Northern Chili and Los Angeles, California have experienced recent earthquakes.  These quakes are along the “Ring of Fire” where Earth underground plates often collide. The IRIS (Incorporated Research Institute of Seismology) Seismic Monitor will allow your class to visualize the most recent…

April Fool’s day perplexors

We have two classic puzzles for your April 1st class starters. PerplexingOne.pdf      PerplexingTwo.pdf CCSS: MP.1, MP3,4.OA, 5.G, 8.EE, 8.SP For members we have solutions. PerplexingOne-solution.pdf     PerplexingTwo-solution.pdf Or you might baffle and amaze your students with our Ghost Whisperer…

Cell phone plans

Its time to go get the latest iPhone, the 5s.  Which of the above plans will you choose?  Should you sign a 2-year contract on one of the above plans to get the iPhone for $200?  Or should you go…

The Perfect Bracket

One Billions Dollars for The Perfect Bracket? Clicking on this image will give you a larger, printable bracket in a new window. Want to win One Billion Dollars?  All you have to do is pick every game correctly in the March…

Green, green river

During the St. Patrick’s Day parade in Chicago, the local plumbers union dyes the Chicago River emerald green.  Students learn what PPM (parts per million) means and  attempt to figure out how much dye is used to sufficiently color the…

3.14@1:59:26 = Happy Pi day

March 14th is almost here. Celebrate π in your school and in your math class with activities that demonstrate how π was derived; show a surprising place where π is used; increase students ability to measure and long divide; applauds the…

Fat Tuesday – Mardi gras

Tuesday, March 4, 2014, will be the day before Ash Wednesday and the start of the season of Lent.  Mardi Gras is the last hoorah and is celebrated throughout the world with feasting, partying, and general indulgence.  In New Orleans…

Cost of movie tickets over time

We’ve updated this activity and thought that we should mention it again as we approach the Academy Awards. In this investigation, Brian looks at the changes in movie ticket prices over the last 30 years. Using his scatter plot (or his data)…

The Ghost Whisperer

Let your students play this great game online at Ghost Whisperer Crystal Ball and Figure out why it works. Construct viable arguments Critique the work of others

Oscars 2014

Let your students develop their own ideas about compounded percent change while they have the opportunity to speak about the upcoming Academy Awards show. Worldwide box office income is compared for the top ten grossing movies of all time. Is…

Valentine’s Day and Presidents’ Day week

Another great week! Sweetheart Candies - unit rate and ratio activity using those little candy hearts. Where have all the flowers … come from? - Analyze a pictograph to see what can be deduced.  Cost of flowers in different countries, source of…

Presidents’ Pay 2014

Monday, February 17th, is Presidents Day.  We honor presidents, veterans, purple heart recipients and sell cars.  Is there more to Presidents Day?  Students can learn a little of the history of the day while they check out how much various…

How is the Olympic torch lit?

How is she doing that?        Describe what you see. Our animation is simpler than trying to demonstrate the reflections of a parabolic mirror.  Let your students study the sunlight reflections and hypothesize why the focus of the…