Number Sense

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Mother’s Day by the numbers

Number Sense Holidays and Annual Events
Mother’s Day is right around the corner, and that means big business for the greeting card, flower, and restaurant industries. In this activity, students calculate the average Mother's Day spendi...

Thank you, mother and father, for all of those diapers (Updated)

Algebra Number Sense Holidays and Annual Events
Which is a better deal, cloth or disposable diapers?  How much did you cost your parents in diapers?  In the future, how much could your kid's diapers cost?  Help students realize all t...

Hybrid, Electric or Gasoline

Algebra Number Sense Data and probability
 Gas prices are up, EVs are everywhere, and hybrid technology keeps improving!So which car is better? Which car would you/your family choose? Students compare the latest prices (updated) of a hyb...

The Game of GO

Number Sense Math and Social Studies
In March 2016, Lee Se-dol, one of the world's best Go players, and Google's artificial intelligence program "AlphaGo" had their first match. (Watch the incredible Documentary) Exactly 10 years la...

Peeps

Number Sense Math and Food Holidays and Annual Events Data and probability
"How many Peeps do you think are sold for Easter in the U.S.?"In this updated activity, students start by making their own guesses for the number of Peeps sold each Easter. They then consider what inf...

The Last Great Race on Earth

Algebra Number Sense Sports Ratio and Proportion
The Iditarod Trail Sled Dog Race is an annual event in which mushers and teams of 12-16 dogs race across Alaska from Anchorage to Nome, in the cold and dark of March. It is also known as “The Las...

The Ultimate Key Lime Pie

Number Sense Geometry Math and Food Any time math
 On a cold and snowy day in Boston about ten years ago, two chefs created a huge Key Lime pie to remind the frozen people of the Northeast how tasty and warm the Keys of Florida are. In this upda...

Lunar New Year 2026

Number Sense Holidays and Annual Events Current events Any time math
 The 2026 Lunar New Year falls on Tuesday, February 17. In this updated activity, students will explore the unique naming system of the Lunar New Year, which combines the Heavenly Stems and Earth...

Super Bowl Numerals

Number Sense Sports Holidays and Annual Events
Super Bowl numbers are appearing again! As students start getting into the current Super Bowl hype, help them to understand the notation that the sports writers and advertisements are using. Intr...

Holiday Candy Sales

Number Sense Math and Food Holidays and Annual Events Data and probability
 In this activity, students will analyze U.S. holiday candy sales percentage data (updated) to calculate the approximate amount spent on candy for each holiday. Students are encouraged to work wi...
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