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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
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
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
Gonna be a Leap Year
Gonna be a Leap Year

By George C. Baxley This year we will add the 29th of February to our year? Why do we do that? How can you tell? What if we...

Number Sense Math and Science Grades 4–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
Point of view
Point of view

If you have a set of cubes for your classroom, this would make a great group hands-on project. Its an old puzzle but the activity deserves a revisit....

Geometry Math and Art Grades 3–HS
Louisiana
Louisiana

We recently watched the approach of Hurricane Barry and worried about the fate of Louisiana. After the devastation of Hurricane Katrina, what would another powerful hurricane do to...

Algebra Number Sense Grades 4–HS
Spiraling squares - compass and straight edge
Spiraling squares - compass and straight edge

Can you see the many spirals in this design? Students calculate the size of each increasing round of squares and consider what sort of spirals these must be....

Algebra Number Sense Grades 6–HS
Tornadoes 2019
Tornadoes 2019

Tornadoes have devastated the Midwest, U.S. in the last few days. Alabama, Texas, Louisiana, Oklahoma, Ohio, Missouri, Iowa, Nebraska and Mississippi have been brutally hit with these powerful...

Number Sense Math and Science Grades 5–HS
Can this possibly be True?
Can this possibly be True?

This activity is being updated =). Could this possibly be true? What is reasonable? How do you check? Do you believe everything that you hear or read? Do...

Number Sense Math and Science
Pythagorean Triples and coloring
Pythagorean Triples and coloring

Pythagorean triples are not only handy for students to recognize but produce some interesting and lovely patterns. We've combined a little coloring with our Pythagorean Triple pattern investigation...

Algebra Number Sense Grades 6–HS
V-o-r-t-e-x
V-o-r-t-e-x

Weather temp eratures have been extreme in the World lately. Australia is experiencing an unprecedented heat wave and the U.S. is experiencing a Polar Vortex. Let your students...

Number Sense Math and Science Grades 4–6