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National Donut Day (2 activities)
National Donut Day (2 activities)

Friday, June 5th, is National Donut Day . We have 2 activities to support this silly holiday. How much have doughnuts changed? Students become familiar with the word...

Algebra Geometry Grades 4–HS
Pi Day Activities
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....

Geometry Holidays and Annual Events Grades 3–7
The Ultimate Key Lime Pie
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...

Number Sense Geometry Grades 3–7
Tech Neck
Tech Neck

How much strain does your neck feel when you look down at your phone? In this activity, students explore the growing issue of tech neck by observing posture,...

Number Sense Geometry Grades 6–7
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
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
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