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How many cars are there?
How many cars are there?

Brian came home from work to find that his son had his toy cars organized in a tight parking lot on our front porch. ? Below is a...

Number Sense Geometry Grades 2–4
A gorgeous, glittery card
A gorgeous, glittery card

Uh oh! How do you find the area of a heart? Get your students to help you calculate how many sequins you'll need to order for this class...

Number Sense Geometry Grades 2–7
Measuring sea level
Measuring sea level

What does this gizmo do? We've given students a diagram of what the interior of this mechanism contains and asked them to try to decide what its purpose...

Algebra Number Sense Grades 5–HS
Giant iceberg
Giant iceberg

Ferryland, Newfoundland. JODY MARTIN / REUTERS This giant iceberg drifted past Ferryland, Newfoundland in 2017. It's hard to tell how large it actually is, but it looks huge....

Number Sense Geometry Grades 4–HS
Patriots' Day
Patriots' Day

We celebrate Patriots' Day to commemorate the beginning of the Revolutionary War and the battles of Lexington and Concord. Students learn more about the difficulties of the Revolutionary...

Number Sense Math and Social Studies Grades 4–7
Alarming ice cracks on Brunt Ice Sheet in Antarctica
Alarming ice cracks on Brunt Ice Sheet in Antarctica

A new, fast-growing ice crack is forcing the Halley VI British research station in Antarctica (shown above) to be moved. Fear of a huge break-off from the ice...

Algebra Number Sense Grades 5–HS
How did I graph this heart?
How did I graph this heart?

In this activity, students will use mathematical equations to create a heart shape on a coordinate plane. This activity encourages students to apply their algebra and graphing skills...

Algebra Geometry Grades 7–HS
Have a heart
Have a heart

Clicking on the image above will show the heart larger in a new window. Canstruction® is an event hosted in more than 150 countries throughout the world to...

Number Sense Geometry Grades 4–HS
Super Bowl cheesy pretzel poppers
Super Bowl cheesy pretzel poppers

Recipe courtesy of The Slow Roasted Italian A little more delicious work for the Super Bowl. Students follow a recipe that involves "cutting the cheese" block, figuring how...

Number Sense Geometry Grades 4–6
Civil rights marches, how do you count a crowd?
Civil rights marches, how do you count a crowd?

On October 16, 1995, perhaps a million black men gathered for the Million Man March on Washington. This was 32 years after Martin Luther King, Jr. gave his...

Number Sense Geometry Grades 3–HS
It's latke time
It's latke time

In Leslie's family it is traditional to eat latkes (Yiddish for little potato pancakes) at this time of year. They are fried in a lot of oil and...

Number Sense Math and Food Grades 5–6
What's wrong with this picture?
What's wrong with this picture?

We've gotten used to believing what we read or see advertised. But sometimes the clerk doesn't get the sales discount right or something seems a little off. Let...

Number Sense Geometry Grades 5–6