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Pick-a-brick wall at the Lego store
Pick-a-brick wall at the Lego store

There are walls at the Lego stores that are filled with individual Lego parts. You can fill a bucket and pick out exactly what you need. Use this...

Number Sense Geometry Grades 2–5
Shrinking Toblerone
Shrinking Toblerone

New York Times photo - Credit Darren Staples/Reuters They changed it. That is so not fair ... or is it? You can check out a video news story...

Number Sense Geometry Grades 4–HS
Cheap-otle?
Cheap-otle?

mage from Chipotle. One of my favorite foods is a burrito. One of my favorite places to get a burrito is Chipotle . Their food is delicious and...

Number Sense Math and Social Studies Grades 4–7
Pascal's Triangle coloring and Probability
Pascal's Triangle coloring and Probability

Pascal's Triangle and Probability - This activity could be used to explore the probability of coin tossing results. When the combinations get too complicated to list, students can...

Algebra Number Sense Grades 6–HS
Flag Art
Flag Art

A little ratio art might be a fun way to get ready for the upcoming Memorial Day holiday. In this activity (Flags) students measure; create whole number ratios...

Number Sense Geometry Grades 3–7
How did they figure these tips?
How did they figure these tips?

Act I: This restaurant bill has the suggested tips, but they are smudged out. What should they be? Consider having students make a fast 5 to 10 -second...

Number Sense Math and Social Studies Grades 5–7
What's my angle?
What's my angle?

I'm going to help save the planet by adding solar panels to my roof! Should I tilt the panels on my roof to more accurately aim towards the...

Geometry Math and Science Grades 7–HS
Giant chocolate bunnies
Giant chocolate bunnies

What can you deduce about these bunnies from their descriptions ... solid? hollow? cost per pound? cost per height? Anything else? For Adventurer members we have an editable...

Number Sense Geometry Grades 5–6
How Many Pennies did Otha Save?
How Many Pennies did Otha Save?

Otha Anders used picking up pennies as a way to remember to pray. In this 3-act activity we try to estimate how much he actually collected and stored...

Number Sense Geometry Grades 4–6
Mark Zuckerberg and Priscilla Chan to give away 99% of their shares of Facebook
Mark Zuckerberg and Priscilla Chan to give away 99% of their shares of Facebook

That sounds like an awful lot of their Facebook shares. They want to help create a better world for their daughter, Max. I wonder if they will have...

Algebra Number Sense Grades 5–HS
Rescue of the Chilean miners - The 33
Rescue of the Chilean miners - The 33

On August 5, 2010, the San Jose copper-gold mine near Copiapó, Chile collapsed stranding 33 miners in a large cavern more than 2,000 feet below ground. A new...

Geometry Math and Science Grades 6–HS
How much have doughnuts changed?
How much have doughnuts changed?

Part of the Smithsonian's Sally L. Steinberg Collection of Doughnut Ephemera -- Click on the image to see it larger. When you are working on volume in your...

Algebra Number Sense Grades 7–HS