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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
Will I pay less if I buy more?
Will I pay less if I buy more?

image designed by macrovector / Freepik This activity can be used in a large range of grade levels. Your class can work on percents, linear equations or piecewise...

Algebra Number Sense
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
Veterans Day, 2023
Veterans Day, 2023

This activity will be updated before October, 2026. Stay tuned! On Veterans Day we honor the men and women that have served in the Armed Forces of the...

Algebra Social Studies Grades 4–HS
2023 World Cup Cricket
2023 World Cup Cricket

The Cricket World Cup is being played now (October 5 to November 19, 2023) in India. This is a complex game that is played with enthusiasm and humor....

Algebra Number Sense Grades 5–HS
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
Leslie's Yummy Pumpkin Pie
Leslie's Yummy Pumpkin Pie

Every year more and more people come to our house on Thanksgiving morning for my (Leslie's)famous pumpkin pie and a hike in the nearby woods. This year 23...

Algebra Number Sense Grades 3–5
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
Nobel Prizes
Nobel Prizes

The Nobel Prizes have just been awarded. This is the medal that is given to the winners. What do you know about the Nobel Prize? Who do you...

Algebra Number Sense Grades 5–HS
More Population Pyramids
More Population Pyramids

The population pyramid above shows the distribution of the World by ages and sex for each continent. How can that information help you put your vision of the...

Algebra Number Sense Grades 5–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
Huge Alaskan Vegetables
Huge Alaskan Vegetables

The annual Alaskan State Fair has just been completed. As usual, there were some amazingly big vegetables that won the agriculture prizes. Evidently, even though the growing season...

Algebra Number Sense Grades 3–7