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World record Snickers Bar
World record Snickers Bar

In late January, workers at the Mars Wrigley plant in Waco, Texas created this giant Snickers Bar. It won a spot in The Guinness Book of Records as...

Algebra Number Sense Grades 5–7
Mixing colors with food dye
Mixing colors with food dye

I t' s t i m e t o d y e e g g s ! What do you wonder about these recipes (See the activity) for...

Number Sense Math and Food Grades 4–6
Pascal coloring and modular math
Pascal coloring and modular math

In this activity students have the opportunity to color as they investigate Pascal's triangle and the many useful patterns that it shows. The triangle is explored for patterns,...

Number Sense Geometry Grades 2–HS
Gonna be a Leap Year
Gonna be a Leap Year

By George C. Baxley This year we will add the 29th of February to our year? Why do we do that? How can you tell? What if we...

Number Sense Math and Science Grades 4–HS
K-Pop and BTS, how much can they earn from Youtube and Spotify?
K-Pop and BTS, how much can they earn from Youtube and Spotify?

Bring a little K-pop music to your class with this activity. Jason Kibbe, a terrific middle school math teacher in Chambersburg, PA , sent us an activity that...

Number Sense Math and Social Studies Grades 2–6
The Forever Roll
The Forever Roll

That's a big roll of toilet paper! Why would anyone need such a big roll of toilet paper? How does it compare to Charmin's other toilet paper products?...

Algebra Number Sense Grades 4–HS
How long will it take you to trick-or-treat?
How long will it take you to trick-or-treat?

It's Halloween and this is your neighborhood. How long will it take you to trick or treat at every house in your neighborhood? Possible conversation with students: How...

Number Sense Geometry Grades 2–7
Largest coffee, new world record
Largest coffee, new world record

The world record for the largest cup of coffee was recently set (see picture above). In this activity students explore scale, similar figures, volume and measurement as they...

Algebra Number Sense Grades 6–HS
Point of view
Point of view

If you have a set of cubes for your classroom, this would make a great group hands-on project. Its an old puzzle but the activity deserves a revisit....

Geometry Math and Art Grades 3–HS
Louisiana
Louisiana

We recently watched the approach of Hurricane Barry and worried about the fate of Louisiana. After the devastation of Hurricane Katrina, what would another powerful hurricane do to...

Algebra Number Sense Grades 4–HS
Spiraling squares - compass and straight edge
Spiraling squares - compass and straight edge

Can you see the many spirals in this design? Students calculate the size of each increasing round of squares and consider what sort of spirals these must be....

Algebra Number Sense Grades 6–HS
Tornadoes 2019
Tornadoes 2019

Tornadoes have devastated the Midwest, U.S. in the last few days. Alabama, Texas, Louisiana, Oklahoma, Ohio, Missouri, Iowa, Nebraska and Mississippi have been brutally hit with these powerful...

Number Sense Math and Science Grades 5–HS