We stumbled upon this interesting caffeine infographic at visual.ly. Wonderings? How many McDonalds coffees do I need to get the same amount of caffeine that I would get in a Starbucks coffee? What is the whole circle worth? How do you…

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 using map scales, draw conclusions about the nature of fighting fire here,…

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 circles in England appear mysteriously overnight. They are often huge but appear…

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 with an equation generated by Excel or their calculator, and then use…

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 of the cars or the people to approximate the ladder’s length.

Robert Kaplinsky kindly contributed this post. We think it would make a great April Fools day activity. Check out his site for more great lesson ideas. Watch this movie with your class: foil_prank The Challenge(s) How much does it cost to…

Valentine’s Day is here again and that means candies and chocolate. In this activity students approximate the volume (through finding surface area) of three different pieces of chocolate. The chocolates are shaped like a heart, a bat (for Halloween) and…

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 buy enough for 15 years of Twinkies. In this activity, students examine…

Brian Shoemaker, a Newton, MA mathematics teacher, saw this Dunkin Donuts Mazda traveling down the road. He wondered if that size coffee cup could really have coffee in it. Wouldn’t the car rock back on its rear bumper? How much…

Act One: Check out all of the pennies! What questions come to mind? If you want the most money, which container should you pick? What information do you need to answer this question? What assumptions must you make to solve…

I found this graphic online that should help me figure out when to try to watch an Olympic event on any day. The chart seems a little confusing. Can your students help me figure it out?

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 here in Boston?

Whoa! I have two fish in my aquarium. Betty, my white goldfish always stays really close to the front wall as she swims towards her food. However, Stripe, my striped goldfish swims diagonally across the tank to the back top…

Use this activity to help your students discover the Pythagorean theorem. Pythagorean theorem work is often skill and drill work with contrived right triangle problems. In this activity students work with a visual representation of the Pythagorean theorem in order…

We can’t get enough NFL. Check out the video above that revisits a truly great NFL playoff play. In the 2005 AFC divisional championship game between the New England Patriots and the Denver Broncos, Benjamin Watson stopped a touchdown in…