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California wildfire
California wildfire

Wildfires are burning in the Sierra Nevada Mountains near Yosemite National Park. In this activity we ask students to examine various maps of this California region, calculate distances...

Number Sense Geometry Grades 4–7
Crop circles
Crop circles

In the travel section of our newspaper this week, Wiltshire, England was a recommended destination to see Stonehendge and crop circles ........... crop circles? Many of the crop...

Algebra Geometry Grades 4–7
Methane math
Methane math

Updated! Carbon dioxide and methane are our two most prevalent human-contributed greenhouse gases. This holstein cow is one of many huge contributors to our methane production. Let students...

Algebra Number Sense Grades 5–HS
My teacher says this stream is parabolic.  Is he correct?
My teacher says this stream is parabolic. Is he correct?

Instead of asking students to just believe what you've said, why not ask them to verify your assertions? Students plot the points of the stream, perhaps map them...

Algebra Number Sense Grades 7–HS
Father's Day blueberry surprise
Father's Day blueberry surprise

Father's Day is coming up, and there is still time to have a tiny fraction review in the guise of celebrating Father's Day. This is a short activity...

Number Sense Math and Food Grades 3–6
Ladder figuring
Ladder figuring

Brian can't even go to his town's spring festival without seeing math. Let your class approximate the height or length of this ladder by using the relative size...

Algebra Number Sense Grades 5–HS
Big gulp
Big gulp

Do you or your students love sugary drinks? What if it were against the law to order a large sugary drink where you lived? On September 13th, 2012...

Algebra Number Sense Grades 5–7
Cruising
Cruising

There have been a lot of cruise ship mishaps and disasters this year. While these are in the news, let your students consider how these floating cities manage...

Algebra Number Sense Grades 4–7
Twinkies
Twinkies

Brian loves Twinkies and the news that Hostess is going out of business has upset him terribly. He needs his Twinkies. Twinkies last forever. Right? He's going to...

Number Sense Geometry Grades 4–6
Is this possible?
Is this possible?

Brian Shoemaker, a Newton, MA mathematics teache r, saw this Dunkin Donuts Mazda traveling down the road. He wondered if that size coffee cup could really have coffee...

Algebra Number Sense Grades 6–HS
What time is it in Cambodia?
What time is it in Cambodia?

I need help! My daughter is traveling in Cambodia and we are supposed to Skype just before her dinner time in Phnom Penh, Cambodia. What time is that...

Algebra Number Sense Grades 4–7
Storm cleanup
Storm cleanup

This activity could be used as an introduction to trig ratios. Students figure out the approximate length of the huge branch that I have to fell for safety...

Algebra Number Sense Grades 6–HS