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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 6–7
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 5–HS
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
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 5–HS
Pokémon GO!  I should have invested
Pokémon GO! I should have invested

Pikachu Pokémon GO is all the rage. News reports show people glued to their smart phones as they travel to nearby landmarks where virtual critters appear and need...

Algebra Number Sense Grades 5–HS
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
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