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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
Cost of light bulbs (Updated)
Cost of light bulbs (Updated)

With incandescent and halogen bulbs banned since 2023, students compare CFL, LED, and Smart LED bulbs, calculate energy use in kilowatt-hours, and determine which bulb is the better...

Math and Social Studies Ratio and Proportion Grades 5–7
The Game of GO
The Game of GO

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...

Number Sense Math and Social Studies Grade 7
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
Lunar New Year 2026
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...

Number Sense Holidays and Annual Events Grades 3–6
The huge costs behind the Olympics
The huge costs behind the Olympics

Hosting the Olympic Games is extremely expensive. In this updated activity, students explore the cost of hosting the Olympics, what a cost overrun (percentage increase) means, and how...

Algebra Math and Social Studies Grades 5–7
Macy's Thanksgiving Parade (2025)
Macy's Thanksgiving Parade (2025)

🎈Get excited for Thanksgiving with this updated Macy’s Thanksgiving Day Parade activity! Students explore this year's parade map to find the number of parade blocks, use the map’s...

Number Sense Holidays and Annual Events Grades 3–6
Typhoon Rasaga
Typhoon Rasaga

What is a typhoon, and how are they measured? In this activity, students learn about the recent typhoon (Typhoon Rasaga), storm rankings, and severity while practicing unit conversions...

Number Sense Math and Science
Labor Day 2025
Labor Day 2025

In our usual Labor Day activity (updated for 2025), students will learn about the intended meaning of Labor Day and explore the patterns behind its historical dates. They...

Math and Social Studies Holidays and Annual Events Grades 5–7
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
C and F
C and F

This activity begins with exploring connections among a few photos to spark curiosity and critical thinking in the starters, before diving into the main activity where students will...

Math and Science Any time math Grades 6–7