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Candy Count: Which Bag Holds the Most Candy
Candy Count: Which Bag Holds the Most Candy

🎃Leverage your students' Halloween enthusiasm with this activity, where they’ll calculate the volume of various trick-or-treat bags—ranging from rectangular prisms to spheres, cylinders, and cones to discover which...

Number Sense Geometry High School
Ghostly Measurements
Ghostly Measurements

In this activity, students will explore how to design a ghost costume 👻 👻 by reasoning through sheet dimensions, calculating the best fit for different heights, and interpreting...

Algebra Geometry Grades 5–HS
How much pee is in your pool (Updated)
How much pee is in your pool (Updated)

How much pee is in your pool? 🏊🏊 After chlorination, it has been hard to measure the quantity of pollutants in pool water. A Canadian chemist, Xing-Fang Li,...

Number Sense Geometry Grades 3–6
A Glass of Sweat
A Glass of Sweat

What is this machine for? Begin with the starter presentation slides to spark students' curiosity about the purpose of the machine. Then, engage them in the main activity...

Algebra Number Sense Grades 4–6
Happy National D🍩nut Day!
Happy National D🍩nut Day!

We have 2 activities to support this silly, but awesome holiday -- National Donut Day (June 5th) : How much have donuts changed? Students become familiar with the...

Math and Food Holidays and Annual Events
How much does America spend for Mother’s Day?
How much does America spend for Mother’s Day?

Updated in April 2026 with new data; see the answer key. How much do we spend on Mother's Day? Use the Mother's Day event to engage your students...

Number Sense Math and Social Studies Grades 3–6
Earth Day Actions for Our Planet (April 22)
Earth Day Actions for Our Planet (April 22)

We have 16 activities that you could use for Earth Day! April 22nd is Earth Day. Help your students become activists for our planet? We have 16 activities...

Algebra Number Sense Grades 4–HS
A geodesic icosahedron, the Times Square New Year's eve ball
A geodesic icosahedron, the Times Square New Year's eve ball

Image by kjpargeter on Freepik 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...

Geometry Math and Science
What is a quantum dot?
What is a quantum dot?

In this activity, students work through the nomenclature to understand the possibilities of nano science and quantum dots. Questions that are answered; How many nanometers are in a...

Algebra Number Sense High School
Veterans Day, 2023
Veterans Day, 2023

This activity will be updated before October, 2026. Stay tuned! On Veterans Day we honor the men and women that have served in the Armed Forces of the...

Algebra Social Studies Grades 4–HS
DST ends November 5th, 2023 - strange happenings
DST ends November 5th, 2023 - strange happenings

In this activity students try to figure out how time settings will change as they move from place to place and in the serious weirdness of Arizona and...

Algebra Number Sense Grades 4–HS
Leslie's Yummy Pumpkin Pie
Leslie's Yummy Pumpkin Pie

Every year more and more people come to our house on Thanksgiving morning for my (Leslie's)famous pumpkin pie and a hike in the nearby woods. This year 23...

Algebra Number Sense Grades 3–5