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The HAT tessellation
The HAT tessellation

 An Einstein aperiodic tile has just been discovered. Find out what that means and why it is significant. Plus - play with the tiles. Do you want...

Geometry Math and Art Grades 3–HS
Time to make your prom clothes ... with Duck Tape
Time to make your prom clothes ... with Duck Tape

Larissa Leon, from Texas, in her gorgeous Duck Tape prom gown. If you are going to make your prom clothes then you should start soon ... and buy...

Number Sense Math and Social Studies Grades 4–HS
What is an atmospheric river(AR)?
What is an atmospheric river(AR)?

North America from space. Elements furnished by NASA - https://www.noaa.gov/stories/what-are-atmospheric-rivers How are they ranked? Students become familiar with this weather phenomena and learn how the different ARs are...

Algebra Math and Science Grades 4–HS
How hard it is to pick the perfect bracket? (Updated)
How hard it is to pick the perfect bracket? (Updated)

Updated (2026)! Games have begun and there have been several upsets but March Madness won't be over until the finals on April 3rd and 4th. March Madness bracket...

Algebra Number Sense Grades 5–HS
March Equinox - big deal? ... and 5 more Spring activities
March Equinox - big deal? ... and 5 more Spring activities

What's with the March Equinox? Does it really affect our lives? Is it just some astronomical occurrence? Students calculate the daylight hours at the March Equinox by time...

Algebra Math and Science Grades 2–6
March Madness - Does seeding really matter?
March Madness - Does seeding really matter?

March Madness, the big 68 team college basketball tournament, will now take over our TV viewing during the weekends of March. School and office friends are filling out...

Number Sense Sports Grades 5–6
Just some March Madness math
Just some March Madness math

Today, March 12th, is selection Sunday. Tomorrow we'll know how the college basketball teams are seeded and bracketology can begin. Introduce your students to the meaning and excitement...

Algebra Number Sense Grades 2–HS
Daylight savings time
Daylight savings time

Updated and improved! Is Daylight savings time helpful? How does it make you feel? "Spring forward, fall back" Early Sunday morning, March 12 th at 2 am ,...

Algebra Number Sense Grades 4–HS
Chocolate heart-shaped raspberry cake
Chocolate heart-shaped raspberry cake

For Valentine's Day, bake a cake! Students calculate base area or volume of cakes made from 2 cake pan sizes and observe how the volume of the cake...

Geometry Math and Food Grades 5–HS
Typical Super Bowl scores
Typical Super Bowl scores

Updated for 2023! In this activity students study historical Super Bowl data to reflect on average (mean, median, and mode), losing scores, winning scores, and range of scores....

Algebra Number Sense Grades 5–HS
Big bucks 2023
Big bucks 2023

Updated! When soccer great, Lionel Messi played for Barcelona, he had one of the highest paid contracts of any athlete in the world. He had a $674 million...

Number Sense Sports Grades 5–7
Total lunar eclipse
Total lunar eclipse

On the morning of November 8, 2022, many of us will be able to see the last full lunar eclipse until March 2025. Luckily, many of us will...

Geometry Math and Science Grades 3–HS