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Cost of light bulbs (Updated)
Cost of light bulbs (Updated)

With incandescent and halogen bulbs banned since 2023, students compare CFL, LED, and Smart LED bulbs, calculate energy use in kilowatt-hours, and determine which bulb is the better...

Math and Social Studies Ratio and Proportion Grades 6–8
Germ-Killing Wipes
Germ-Killing Wipes

In this activity, students get to dig into the real impact of disinfectant wipes. With one wipe claiming to kill 99.9% of germs and another at 99.999%, does...

Math and Science Grades 5–7
Earth Day Actions for Our Planet (April 22)
Earth Day Actions for Our Planet (April 22)

We have 16 activities that you could use for Earth Day! April 22nd is Earth Day. Help your students become activists for our planet? We have 16 activities...

Algebra Number Sense Grades 5–HS
Inflation and the cost of gasoline
Inflation and the cost of gasoline

In 1980, one gallon of gasoline costs $1.22. Today's prices are a lot higher. Is that because the price has gone up or because in 1980 you could...

Algebra Number Sense Grades 5–7
How should I cook my turkey?
How should I cook my turkey?

Should I oven bake it, deep fry it or barbecue and smoke it? When do I have to wake up to begin preparations? How long will the cooking...

Algebra Number Sense Grades 4–7
Does it pay to get educated?
Does it pay to get educated?

This activity is currently being updated…stay tuned! (May 2026) Why should students do well in school, graduate high school, or go on to college? In this activity median...

Number Sense Math and Social Studies Grades 5–8
What me?  Irrational?
What me? Irrational?

We've found that some students believe that the approximation that their calculators show for irrational numbers is exact. Here's an activity that you can advertise as long multiplication...

Number Sense Grades 5–8
Patriots' Day
Patriots' Day

We celebrate Patriots' Day to commemorate the beginning of the Revolutionary War and the battles of Lexington and Concord. Students learn more about the difficulties of the Revolutionary...

Number Sense Math and Social Studies Grades 5–8
Cheap-otle?
Cheap-otle?

mage from Chipotle. One of my favorite foods is a burrito. One of my favorite places to get a burrito is Chipotle . Their food is delicious and...

Number Sense Math and Social Studies Grades 5–8
How high can a gymnastic score be?
How high can a gymnastic score be?

Gymnasts have just successfully competed in St Louis, Missouri for positions on the USA Olympic team. As you watch their performances don't you wonder how their scores are...

Algebra Number Sense Grades 5–7
How Many Pennies did Otha Save?
How Many Pennies did Otha Save?

Otha Anders used picking up pennies as a way to remember to pray. In this 3-act activity we try to estimate how much he actually collected and stored...

Number Sense Geometry Grades 5–7
An ounce of cola
An ounce of cola

Which is more expensive; gasoline? milk? or cola? Students calculate the per ounce cost of each of these liquids in a story about a man doing errands. After...

Number Sense Math and Food Grades 5–7