Rapunzel
A live-action remake of Disney's Tangled is now in the works! In this updated activity, students use ratios and proportional reasoning to estimate the weight of Rapunzel's magical hair in the an...
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Peeps
"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
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...
Pi Day Activities
5 Activities for π day! What is π? The logic of finding the perimeters of inscribed and circumscribed polygons as the number of sides to the polygons increases. Good in...
The Ultimate Key Lime Pie
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
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...
Valentine's Day Activities (List)
Celebrate Valentine’s Day with our activities: Have a heart (Canstruction)Students use reasoning and approximation to analyze the number of cans of food contained in this one giant heart. ...
Super Bowl Numerals
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...
2026
As the new year approaches (where did the time go!!?), our annual activity has students explore not-so-common number categories to investigate whether 2026 fits into any of these. What is a Hars...
Holiday Shipping
Now that the holiday shopping season has begun, it's time to get the packages to your homes. Two big companies take care of a lot of that shipping. How do they manage that? Did you ever wonder h...