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…

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 calculate percentages of greenhouse gas production from cars, cows, and people. We’ve got…

Brian has introduced systems of equations with easy, motivating problems that deal with the cost of stadium purchases for food or souvenirs. These systems of equations puzzles are so intuitive that very little support will be needed

Sunday is Father’s Day and there is still time to have a tiny fraction review in the guise of celebrating Father’s Day. This is a short activity that asks students to change the amounts in a blueberry muffin recipe to…

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 the New York City Health Department banned sodas and sweetened drinks larger…

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 their resources and which of their needs are precarious as they calculate…

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 a chocolate turtle irregular shape.

Jennifer Fairbanks from Hopkinton, MA sent us this picture of the cookies that she baked in 4 hours using 13 eggs and 5 cups of sugar. Do you see some math here?

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…

Time to give students some authentic math on a topic they will surely be interested in … Starbucks. We ask and answer a few questions in this activity. About how many drinks does Starbucks sell in a year? If I…

This summer I visited Alaska and truly enjoyed the majesty of the Alaskan scenerey and the many accomplished people that I met. At the time that I was there, the newspaper’s front page was filled with pictures of huge vegetables…

Gumball Machine Problem from Brian Marks on Vimeo. Show Brian’s video to your class and let your students cogitate, estimate and calculate. Sheet with only a still shot from the video and room for figuring: gumball-image.pdf We have a solution…

Chemistry experiments and algebra problems sometimes ask students to create percent mixtures or to change a mixture into a stronger or weaker solution by adding more of an ingredient. Students often have difficulty isolating the key concepts involved in this…