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How big is this hornet really?
How big is this hornet really?

Egad !!!! Giant Asian hornets have now migrated to Washington state and British Columbia. Even though they are sometimes called "murder hornets" their stings aren't fatal. Their stings...

Number Sense Geometry Grades 3–6
String design, ellipses, and orbital mechanics
String design, ellipses, and orbital mechanics

Here's a different and somewhat artistic way to encourage understanding of a conic section. Participants physically build an ellipse by choosing two foci and sketching the figure through...

Number Sense Geometry Grades 6–HS
Coronavirus trends
Coronavirus trends

Johns Hopkins University of Medicine has a team that maintains current maps and data about the Coronavirus. They record changes and show trends of the virus activity throughout...

Algebra Math and Science Grades 6–HS
May 27th launch from the U.S. again
May 27th launch from the U.S. again

May 27 scrubbed because of weather. Successfully launched Saturday, May 30th, 3:22 pm EDT. Dragon is on the way to the ISS now. Wednesday, May 27th will be...

Geometry Math and Science Grades 4–HS
Microns and Masks
Microns and Masks

How big is one coronavirus? How big is a micron? How well do these masks protect against the virus? What can you observe about the size of particles...

Algebra Number Sense Grades 3–HS
Stock Market headlines - Biggest losses since 2008
Stock Market headlines - Biggest losses since 2008

This year the Dow Jones Industrial Average made headlines as it dropped in March and April. The Dow is measured in points but this decline can also be...

Algebra Number Sense Grades 5–HS
What is with this chart?
What is with this chart?

A fellow teacher, Laura Deschaines , saw this chart on the news the other night. What do you notice? Does anything seem amiss? What should it look like?...

Algebra Number Sense
Mixing colors with food dye
Mixing colors with food dye

I t' s t i m e t o d y e e g g s ! What do you wonder about these recipes (See the activity) for...

Number Sense Math and Food Grades 4–6
Hoarding stopped!
Hoarding stopped!

A Danish market found an interesting way to limit hoarding of hand sanitizer. How much are these costs in your currency? What is the unit price on these...

Current events Ratio and Proportion Grades 5–HS
Pascal coloring and modular math
Pascal coloring and modular math

In this activity students have the opportunity to color as they investigate Pascal's triangle and the many useful patterns that it shows. The triangle is explored for patterns,...

Number Sense Geometry Grades 2–HS
How many delegates does each state get to send to the Democratic Convention?
How many delegates does each state get to send to the Democratic Convention?

Texas gets to send a lot more delegates to the July National Democratic Convention than New Hampshire does. How do they figure out what each state's fair number...

Number Sense Math and Social Studies Grades 5–HS
K-Pop and BTS, how much can they earn from Youtube and Spotify?
K-Pop and BTS, how much can they earn from Youtube and Spotify?

Bring a little K-pop music to your class with this activity. Jason Kibbe, a terrific middle school math teacher in Chambersburg, PA , sent us an activity that...

Number Sense Math and Social Studies Grades 2–6