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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 4–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 6–7
10 Million nematodes
10 Million nematodes

Nematodes Grubs are killing my grass. I don't want to put poison into the ground. What can I do? There are tiny roundworms called beneficial nematodes. They can...

Algebra Number Sense Grades 5–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 4–8
Pottytalk
Pottytalk

I'm trying to be more savy about wasting our resources. I have really old fashioned toilets and I'm trying to figure out if I should invest in saving...

Algebra Number Sense Grades 8–HS
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 6–8
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 8–HS
Figuring planting dates
Figuring planting dates

It's time to get ready to plant my garden again. But here in Boston we have to start our seeds indoors to give them a head start before...

Algebra Number Sense Grades 8–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 6–7
Temperature change (Discussion Prompts)
Temperature change (Discussion Prompts)

Note: This is not intended as a comprehensive activity with solutions. Instead, it serves as a discussion prompt. Have fun! It's been a crazy winter of extremes through...

Number Sense Math and Science Grades 6–7
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 6–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 7–HS