Category: Ratio and Proportion

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 last us?  Is it too big and we will have…

Mardi Gras – Fat Tuesday

Tuesday, March 5, 2019, will be the day before Ash Wednesday and the start of the season of Lent.  Mardi Gras is a last hoorah and is celebrated throughout the world with feasting, partying, and general indulgence. In New Orleans…

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for one hour and then promised a lifetime of Whopper meals, an Oregon man sued BK when the manager’s promise was withdrawn.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 should he ask for in his suit? The activity: BurgerKingBathroomLawsuit.pdf

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). Do the Presidents need a raise?

Choosing the NBA All-Star team

Sunday, February 17th will be NBA All-Star game.  The two team captains are Giannis Antetokounmpo (Milwaukee Bucks) and LeBron James (Los Angeles Lakers). These guys were the vote getters among fan/media/players votes. On Thursday, Feb. 7 at the All Star Draft Show they…

Valentine’s Day (11 possibilities)

Parametric graphing, heart area, chocolate volume, making a heart-shaped cake, pie charts of holiday candy sales, how many cans in a can heart canstruction, where do all of those flowers come from, best deal on bagged candies, making a cardioid … Valentine everything!

Bowling Deals

Clicking on this image will show it larger in a new window. Is there a general way to figure how much its going to cost you (and your friends) to go bowling? Should you pay per game?  Or bowl per…

Martin Luther King, Jr. (4 activities)

Data on the National Mall sites – Two data analysis activities about the National Mall. Who do we honor? – What people or events are included in the National Mall monuments? Students use fractions or percents to decide what they can notice…

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 like on a ring on your finger?

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 object that we have ever been able to see close-up.  In this activity student do some rate conversions to try to understand the delay in knowing that the mission was a success.

Times Square Ball Drop

Share the data in your class and ask what the numbers make your students wonder and what they can observe from the information. Happy New Year!

Winter and holiday posts (16 great activities)

Soda Santa

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. 7.G.3, HSG.C, HSG.GMD.4, HSG.MG.1 –  Updated for 2018! Soda Santa – First students guess too…