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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
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
So just print some more money!
So just print some more money!

What's the big deal with our deficit? Do we actually borrow money to cover our debt? If we do, imagine the interest charges? Help your students (and their...

Number Sense Math and Social Studies Grades 6–HS
Who's going back to school?
Who's going back to school?

Students look at the past and present populations of the U.S. and the past and present population of school attendees to calculate the percentage of the population that...

Algebra Number Sense Grades 6–8
Bears Ears revisited
Bears Ears revisited

There is some beautiful land in Utah that was changed last year from federally protected land to Utah overseen land. The buttes of Bears Ears (shown above) and...

Math and Social Studies Current events Grades 6–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 5–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
How long would it take to build this underground house and pool?
How long would it take to build this underground house and pool?

The building of this underground house and pool was presented by Cayote Person and his partner, Mark Lavins, on their youtube channel, "Brave Wilderness." At BraveWilderness.com the business...

Algebra Number Sense Grades 5–HS