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How many baseballs are in this truck?
How many baseballs are in this truck?

In 2017, Old Dominion Freight Line offered 2 free tickets to the next 3 World Series to the person who guesses closest to "How many baseballs are in...

Algebra Geometry Grades 7–HS
Wildfires and particulate matter
Wildfires and particulate matter

Wildfires in Canada have been spreading dangerous smoke pollution throughout much of North America. What is a dangerous size of particles per cubic meter (PM)? How tiny is...

Algebra Number Sense Grades 4–HS
What is heat index?
What is heat index?

It's been really hot in many places on our Earth lately. Is some heat more bearable? What is the heat index measure? How does that affect our risks...

Math and Science Current events Grades 2–4
Can Joey and Miki do it again?
Can Joey and Miki do it again?

The MLE - M ajor L eague E ating is a World organization that oversees speed eating contests. Entrants to the various competitions must be members of the...

Algebra Number Sense Grades 4–HS
Doubling your money
Doubling your money

My friend and I were arguing about how long it would take me to double my investment amounts. How will your students figure this out? Are there any...

Algebra Number Sense Grades 6–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
Patterns in the binomial expansion, Pascal
Patterns in the binomial expansion, Pascal

Realizing that (X+Y)n can be expanded with the help of Pascal's Triangle offers some pretty and interesting math play. We love to bring a little fun and beauty...

Algebra Number Sense Grades 6–HS
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