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Spicy hot chocolate for the Dia de los Muertos
Spicy hot chocolate for the Dia de los Muertos

The Day of the Dead is always on the first and second of November. Life and death are part of the natural cycle of life and the Dia...

Algebra Number Sense
I should have invested!
I should have invested!

People who have invested their money in the stock markets could have made a lot of money in recent years. Students use yearly percent increase data to decide...

Algebra Number Sense Grades 6–HS
Which sale would you rather use?
Which sale would you rather use?

In this short activity, students decide if these two sales are the same. If not, which is better? How would you explain this to someone?

Algebra Number Sense Grades 5–HS
Federal debt and deficit - What are they?
Federal debt and deficit - What are they?

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

Number Sense Math and Social Studies Grades 5–HS
Watson saves
Watson saves

Ben Watson, former American Football tight end, made a remarkable play in 2005 that will forever remain one of the all-time great tackles. The play was in the...

Algebra Geometry Grades 6–HS
Death Valley, CA - How hot was it?
Death Valley, CA - How hot was it?

This picture may have been Photoshopped and not be a true representation. We blacked out the Fahrenheit reading of this temperature sign at the Death Valley Visitor Center....

Algebra Number Sense Grades 5–HS
Steepness and fall hiking
Steepness and fall hiking

Fall is a beautiful time of year for hiking. Many students will be walking in the woods and mountains to enjoy the colorful leaves and the cool weather...

Algebra Number Sense Grades 6–HS
Just ONE hot dog
Just ONE hot dog

A newly released nutritional and environmentally sustainable study shows that eating just one hot dog can take 36 minutes off your total healthy lifespan. How many would you...

Algebra Number Sense Grades 3–HS
That's a big tomato!
That's a big tomato!

These Aussi tomatoes (the tomato on the left of all of the tomatoes) are huge. How much do you guess one weighs? Can you figure it out?

Algebra Number Sense Grades 5–HS
Let's learn to gerrymander
Let's learn to gerrymander

In this activity student first try to redistrict our pretend state in order to preserve the overall state's balance in its new districting plan. Then, students redistrict our...

Geometry Math and Social Studies Grades 4–HS
The drag in swimming - More Olympics activities
The drag in swimming - More Olympics activities

To win in Olympic swimming, contestants have to be incredibly fit and have marvelous endurance and technique. Do they also need to consider the science of their motions...

Algebra Math and Science Grades 6–HS
Need to rent some chaise lounges
Need to rent some chaise lounges

Brian is in Crete and he took a picture of this sign. What do you suppose he's going to ask next? Yep. "How much will 6 lounges and...

Algebra Ratio and Proportion Grades 4–HS