### Number Sense

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#### It's almost summer now

How much water do you have to drink?   In this activity student develop formulas for calculating their water needs, learn about the effects of too little wat...

#### Is 2024 a special number?

Image by dashu83 on Freepik Students are introduced to some esoteric number categories as they check out the various descriptors of this year's date.  What's a Harshad number?  What's a...

#### Will the Barbie movie out-perform Avatar at the box office?

The Barbie Movie is still doing well in the theaters.  It has only been 6 1/2 weeks since its debut.  Do you think that it can out-earn Avatar?  Students study the numbers, recognize ...

#### Will I have enough stuff?

Thursday, Aug 10th, is National S'mores Day! In my pantry I have one new box of Graham crackers, one bag of 6 full-sized Hershey bars, and one bag of marshmallows. Friends are meeting me at the b...

#### It's opening weekend for Barbie

This movie is supposed to be nostalgic, clever, funny, and wildly entertaining. We've written an activity that lets students express their excitement (or lack of) in seeing this new movie, st...

#### 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 th...

#### 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 (2015) - Students compare the cost of buying disposable vers...

#### Is 2023 a special number?

1998 was a Harshad year. What do you notice about the number 2023? What is a Harshad number? Does 2023 meet the criteria? Big deal?  Rare?  Often?

#### The Algebra of Magic Squares

Have you seen magic squares before? How could a teacher use these puzzles to help students with different number skills? How few blank cells could you leave? Are there any special cel...

#### Why isn't the World Cup happening now?

The World Cup Finals is only played every 4 years but isn't it always in June?    The World Cup Finals 2022 will be played in Qatar from November 21st until December 18th, 2022. &nbs...