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Ghostly Measurements
Ghostly Measurements

In this activity, students will explore how to design a ghost costume 👻 👻 by reasoning through sheet dimensions, calculating the best fit for different heights, and interpreting...

Algebra Geometry Grades 5–HS
How much pee is in your pool (Updated)
How much pee is in your pool (Updated)

How much pee is in your pool? 🏊🏊 After chlorination, it has been hard to measure the quantity of pollutants in pool water. A Canadian chemist, Xing-Fang Li,...

Number Sense Geometry Grades 3–6
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 4–HS
A geodesic icosahedron, the Times Square New Year's eve ball
A geodesic icosahedron, the Times Square New Year's eve ball

Image by kjpargeter on Freepik It's a gorgeous ball, covered with Waterford Crystal triangles, shaped as a geodesic icosahedron. Every New Year's Eve it descends in Times Square...

Geometry Math and Science
What is a quantum dot?
What is a quantum dot?

In this activity, students work through the nomenclature to understand the possibilities of nano science and quantum dots. Questions that are answered; How many nanometers are in a...

Algebra Number Sense High School
DST ends November 5th, 2023 - strange happenings
DST ends November 5th, 2023 - strange happenings

In this activity students try to figure out how time settings will change as they move from place to place and in the serious weirdness of Arizona and...

Algebra Number Sense Grades 4–HS
Heating with wood - What's a cord?
Heating with wood - What's a cord?

Do you know what a cord of wood looks like? What size stack is that? What's a thrown stack? What's the dog's name that is standing in front...

Algebra Number Sense Grades 4–HS
Indigenous Peoples or Columbus Day
Indigenous Peoples or Columbus Day

When Columbus landed in Guanahani (renamed San Salvador, Bahama Islands by Columbus), he began the European settlement of the New World. Guanahani was inhabited by the Taíno people...

Algebra Geometry Grades 4–HS
Lego Fireman +
Lego Fireman +

At the Toys R Us store, we saw an amazing LEGO creation. He was a life-sized LEGO fireman with a walkie-talkie, an oxygen tank and even an oxygen...

Number Sense Geometry Grades 5–HS
Autumnal Equinox 2023
Autumnal Equinox 2023

Updated for 2023! Saturday, September 23, 2023 at 06:50 UTC (2:50 am EST), will be the Autumnal Equinox. It is the time of year when an imaginary plane...

Algebra Geometry Grades 5–HS
Little Amal walks across the United States
Little Amal walks across the United States

With our world in so much turmoil and refugees trying to survive hardships by traveling away from their homes, the story of Little Amal is powerful, timely, and...

Algebra Number Sense Grades 4–HS
Women's World Cup - How many matches are left?
Women's World Cup - How many matches are left?

The first round of Group play has finished and now the remaining teams start the second round of play. The teams have already played a lot of matches....

Number Sense Geometry Grades 3–HS