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Summer Solstice, the longest day
Summer Solstice, the longest day

Sunrise on the summer solstice at Stonehenge June 21st, at 10:57 am EDT, the Earth's North Pole will be tilted as far towards the Sun as it will...

Algebra Science Grades 5–HS
Father's Day and Juneteenth; 3 Activities
Father's Day and Juneteenth; 3 Activities

For Father's Day (Links to different activities) Thank you, mother and father, for all of those diapers - Students compare the cost of buying disposable versus cloth diapers....

Algebra Number Sense Grades 3–HS
How many hot chocolate scoops do I need?
How many hot chocolate scoops do I need?

Even though it is now Spring, here in New England we are still chilled and hope that some hot chocolate will warm us up.  Clicking on the...

Number Sense Math and Food Grades 2–4
Souvenirs and concessions
Souvenirs and concessions

Brian has introduced systems of equations with easy, motivating problems that deal with the cost of stadium purchases for food and souvenirs. These systems of equations puzzles are...

Algebra Number Sense Grades 7–HS
The 8th billion baby
The 8th billion baby

How fast is the world's population growing? Will the world's population size increase indefinitely? Are all countries' populations increasing at the same rate? What are some of the...

Number Sense Math and Social Studies
Triple Crown hopefuls at the Preakness
Triple Crown hopefuls at the Preakness

Credit: AP Photo/Garry Jones Saturday, May 20th 2023, will be the running of the Preakness Stakes thoroughbred horse race in Baltimore, Maryland. The Preakness is the second major...

Sports Holidays and Annual Events Grades 5–HS
Effects of new MLB rules
Effects of new MLB rules

This year new rules have been added to Major League Baseball. Pitchers and batters are no longer allowed to "dawdle" or delay the game. The bases are larger....

Algebra Number Sense Grades 4–6
Guacamole for Cinco de Mayo
Guacamole for Cinco de Mayo

Cinco de Mayo (May 5th) is an annual celebration of the 1862 Mexican victory over the French Empire at the Battle of Puebla. It has now evolved into...

Math and Food Holidays and Annual Events Grades 4–HS
New bust of King Charles ... in chocolate
New bust of King Charles ... in chocolate

Saturday, May 6 th 2023 will be King Charles' coronation. It's been a long time since a new monarch was crowned in the United Kingdom. The artists at...

Algebra Number Sense Grades 4–HS
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
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