tags: 4.NBT
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Holiday Movies

Number Sense Holidays and Annual Events Data and probability
Grinch Vectors by Vecteezy Which movie do you think is the highest grossing holiday movie of all time (click on the movie's name below to see its trailer)? Home Alone,  The Grinch, ...

Will sending you back to school this year cost a fortune?

Algebra Number Sense Math and Social Studies Holidays and Annual Events Current events
With high inflation rates, supply shortages, and rethinking what is essential spending, back to school spending might be different this year. Back-to-school spending is huge and students mi...

Women's World Cup - How many matches are left?

Number Sense Geometry Sports Current events
The first round of Group play has finished and now the remaining teams start the second round of play. The teams have already played a lot of matches. How many? And, how many matches are left? ...

It's opening weekend for Barbie

Number Sense Math and Social Studies Current events Data and probability Funny
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...

The 8th billion baby

Number Sense Math and Social Studies Current events Ratio and Proportion Data and probability
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...

The Algebra of Magic Squares

Algebra Number Sense
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...

Whole lot of cookies

Algebra Number Sense Math and Food Holidays and Annual Events Ratio and Proportion Wow factor
Jennifer Fairbanks from Hopkinton, MA sent us this picture of the cookies that she baked in 4 hours using 13 eggs and 5 cups of sugar. Do you see some math here? Do you have an add...

Mental math tricks - part 2

Algebra Number Sense Ratio and Proportion Wow factor
36 x 25 = 900     480 x 25 =12,000    924 x 2.5 = 2,310 Can you see any tricks for doing these calculations in your head? An editable Word docx, solutions/hints, and a PowerPoi...

Refugees from Ukraine

Number Sense Math and Social Studies Current events Data and probability
We are hearing a lot about the war in Ukraine. Civilian Ukrainians are fleeing the war zone in order to remain safe and find food and housing.  How do these numbers compare with other tragic ev...

When will WORDLE run out of words?

Number Sense Current events Data and probability
  Have you played it yet? If so, do you play it every day? Why do you suppose that this game is so popular? When will there be no new 5-letter words to try?
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