The crack in Antarctica’s Larson C ice shelf has been growing for years. Has the speed of the rift’s growth stayed about the same? increased? decreased? Do the math and discuss the implications. The activity: ice-sheet-rift.pdf

Bats eat mosquitoes … lots of mosquitoes. Students compare a bat’s weight to how much he can consume in one night. They calculate how much they would need to eat to consume a comparable proportion of food. We compare the…

In my grocery store they now have these new water bottle refilling stations. You can simply refill your own container with water instead of buying a six-pack of bottled water. Do you think that this is a good idea? Are they…

After chlorination, it has been hard to measure the quantity of pollutants in pool water. A Canadian chemist, Xing-Fang Li, has found a marker for urine that chlorine doesn’t disguise. In this activity, students calculate volume of several pools, change that…

With the start of summer and wonderful outdoor activities, it might be good to examine the growth of Lyme disease occurrences in the United States. The Center for Disease Control and Prevention (CDC) has published maps for all of the…

What does this gizmo do? We’ve given students a diagram of what the interior of this mechanism contains and asked them to try to decide what its purpose must be. Then we’ve given them the data that was collected from…

Over the past Easter weekend this giant iceberg drifted passed Ferryland, Newfoundland. Its hard to tell how large it actually is but it looks huge. Use some of the data that was supplied and your estimation skills to gauge the…

Saturday, April 22nd is Earth Day There is so much to bring to your classroom to support recycling, conserving resources, studying climate change and protecting our planet. McDonald’s moves toward Antibiotic-free chicken – What will the effects be on costs at the restaurant, costs in…

At about 10:00 am, April 15th, April’s calf was born. Everyone will be talking about it and smiling constantly. Here’s some fun math stuff to bring with you for Holiday gatherings. The activity: April’s-calf.pdf

A new, fast-growing ice crack is forcing the Halley VI British research station in Antarctica (shown above) to be moved. Fear of a huge break-off from the ice sheet is alarming not just to the scientists on the station but to…

Green, green river – They’re doing it again. In Chicago, the local plumbers union “dye” the Chicago River emerald green. Students learn what PPM (parts per million) means and attempt to figure out how much dye is used to sufficiently color…

Willow weighed 125 pounds at birth and was 6 feet 1 inch tall. She will grow to her adult height of around 14 feet tall in only four years! How big would you be if you grew at her rate…

Will we have a 29th of February this year? How can you tell? Students work with a flow chart to deduce what years are going to be leap years. They learn about the exact measurement of a solar year and…

Chocolate-raspberry heart-shaped cake – Students build a heart cake and use ratio information to find the quantities of cake and icing resulting from increased dimensions. A parametric heart … with love – Students use unit triangles and manually calculate sine and cosine…

What’s your guess as to how fast the number of daylight hours will change each day from now until June 21st? Will the changes be dramatic? Will the lengthening days be only a subtle change? Students make guesses; compute how…