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Fish Tale
Fish Tale

🐠In this updated activity, students will apply the Pythagorean Theorem in both 2D and 3D (basic) contexts to explore distances in an aquarium. Begin with the starter activity...

Algebra Geometry Grade 7
A Parametric Heart
A Parametric Heart

♥ ♥ ♥ ♥ ♥ ♥ ♥ ♥ In this updated activity, students will explore parametric equations to graph a heart shape using sine and cosine functions. Begin...

Geometry Holidays and Annual Events High School
Holiday Movies
Holiday Movies

In this updated activity, students will explore box office data for top-grossing Christmas movies to analyze and compare earnings. They'll practice skills like rounding, estimating, calculating differences, and...

Number Sense Holidays and Annual Events Grades 3–6
Mathematical Gift Wrapping
Mathematical Gift Wrapping

🎁🎁In this updated activity, students will use math to explore two methods of wrapping gifts, including the mathematical method demonstrated by Sara Santos. They'll calculate the dimensions of...

Algebra Number Sense Grades 6–7
Stone Ice Storage
Stone Ice Storage

In this activity, students will estimate the volume of the Seokbinggo, a centuries-old stone structure, and compare it to the size of their home fridge. Through the activity,...

Number Sense Geometry Grades 4–6
Mashed Potatoes Proportions
Mashed Potatoes Proportions

🥔 "Why do we never have enough mashed potatoes at Thanksgiving?" In this updatedactivity, students will dive into the math of mashed potatoes planning to ensure there’s plenty...

Algebra Number Sense Grades 4–6
Ulmer Nest
Ulmer Nest

🏠In this activity, students will dive into estimation and critical thinking as they explore ‘Ulmer Nest’. It’s essential to start with the starter slides, where students will examine...

Number Sense Geometry Grades 3–6
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
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