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Eliud Kipchoge runs marathon in 1:59:40.2
Eliud Kipchoge runs marathon in 1:59:40.2

Eliud Kipchoge breaks 2 hour marathon barrier. On October 12 th 2019, Eliud Kipchoge ran a marathon in Vienna in under 2 hours. He has now broken a...

Algebra Sports Grades 7–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 3–8
How much should the 40-oz size cost?
How much should the 40-oz size cost?

We found this chalkboard menu at a coffee shop recently. The shop had prices for the 12-oz (small), 16-oz (medium) and 20-ounce (large) cappuccinos. And they will also...

Algebra Number Sense Grades 7–HS
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 7–HS
Does it pay to get educated?
Does it pay to get educated?

Why should students do well in school, graduate high school, or go on to college? In this activity median earnings by various education levels are explored. Students compare...

Number Sense Social Studies Grades 5–8
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 4–HS
How can Nike give away so much great stuff?
How can Nike give away so much great stuff?

Worldwide Nike supports many teams and athletes. They design, manufacture, and supply gear for almost every sport imaginable. How much are those give-aways worth? Is the company going...

Algebra Number Sense Grades 5–HS
How does the pay for women's soccer compare to that of men's?
How does the pay for women's soccer compare to that of men's?

All soccer players on a team aren't paid the same. The best players are paid more than the simply great players. And in Women's soccer those same differences...

Number Sense Math and Social Studies
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 7–HS
NHL Playoff games can sure last a long time!
NHL Playoff games can sure last a long time!

Revised! We're watching another Stanley Cup playoff now. Will there be any really long games during the playoffs? In 2013, a Stanley Cup playoff match between the Bruins...

Algebra Number Sense Grades 3–HS
Are baseball games getting longer?
Are baseball games getting longer?

March 28th, 2018 was opening day for this year's Major League Baseball season. It's a good time for some Major League Baseball math! In this activity students think...

Algebra Number Sense Grades 5–HS
Pythagorean Triples and coloring
Pythagorean Triples and coloring

Pythagorean triples are not only handy for students to recognize but produce some interesting and lovely patterns. We've combined a little coloring with our Pythagorean Triple pattern investigation...

Algebra Number Sense Grades 7–HS