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BIG Snickers bar
BIG Snickers bar

Act 1 - Big question = How many times bigger than a regular Snickers bar is this? What info would you like to know? How are you going...

Algebra Geometry Grades 3–6
Total solar eclipse - apparent sizes
Total solar eclipse - apparent sizes

Where will the eclipse be seen? What if you are not in the path of totality? Total solar eclipse? What is apparent size? How can the moon seem...

Algebra Geometry High School
Giant iceberg breaks off from Antarctica
Giant iceberg breaks off from Antarctica

The crack in Antarctica's Larson C ice shelf has been growing for years (2017). Has the speed of the rift's growth stayed about the same? increased? decreased? Do...

Math and Science Current events Grades 5–HS
Fireworks on your calculator
Fireworks on your calculator

Let your students experiment with their graphing calculators to create a nice fireworks display? We've written a brief activity that questions students about manipulating parabolas, adjusting their calculator...

Algebra Geometry Grades 7–HS
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
Saving Water Bottles
Saving Water Bottles

In my grocery store they now have these new water bottle refilling stations. You can simply refill your own container with water instead of buying a six-pack of...

Algebra Math and Science Grades 7–HS
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
April's calf was born!
April's calf was born!

At about 10:00 am, April 15th, April's calf was born. Everyone will be talking about it and smiling constantly. Here's some fun math stuff to bring with you...

Algebra Number Sense 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
New baby giraffe
New baby giraffe

Willow at Baltimore, MD Zoo Willow weighed 125 pounds at birth and was 6 feet 1 inch tall. She will grow to her adult height of around 14...

Algebra Number Sense Grades 5–6