Number Sense

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Stock Market headlines - Biggest losses since 2008

Algebra Number Sense Math and Social Studies Current events Ratio and Proportion Data and probability
This year the Dow Jones Industrial Average made headlines as it dropped in March and April. The Dow is measured in points but this decline can also be measured in the percentage lost.  W...

World record Snickers Bar

Algebra Number Sense Geometry Math and Food Ratio and Proportion
  In late January, workers at the Mars Wrigley plant in Waco, Texas created this giant Snickers Bar. It won a spot in The Guinness Book of Records as the World's largest Snicker's Bar. Wh...

Mixing colors with food dye

Number Sense Math and Food Holidays and Annual Events Math and Art
It's time to dye eggs! What do you wonder about these recipes (See the activity) for coloring? What would happen if I used the wrong recipe (i.e. cake mix instead of egg dying) for co...

Pascal coloring and modular math

Number Sense Geometry Math and Social Studies Math and Art
In this activity students have the opportunity to color as they investigate Pascal's triangle and the many useful patterns that it shows. The triangle is explored for patterns, coloring...

Is there much of a difference between 99.9% or 99.999%?

Algebra Number Sense Math and Science 3-act tasks Data and probability
Use our present need for cleanliness to engage your students.    Does it really matter whether you kill 99.9% of the bacteria or 99.999% of the germs? In this activity, we'v...

Which gasoline is the cheapest?

Algebra Number Sense Ratio and Proportion
When Brian traveled to Crete last summer with his wife and son on an Archaeological dig, buying gasoline for his small rental car got him wondering again. He was pretty g...

How many delegates does each state get to send to the Democratic Convention?

Number Sense Math and Social Studies Current events Ratio and Proportion Data and probability
  Texas gets to send a lot more delegates to the July National Democratic Convention than New Hampshire does.  How do they figure out what each state's fair number of delegates ...

Gonna be a Leap Year

Number Sense Math and Science Data and probability
  By George C. Baxley  This year we will add the 29th of February to our year?  Why do we do that?  How can you tell?  What if we didn't add a day every 4 years? Stud...

K-Pop and BTS, how much can they earn from Youtube and Spotify?

Number Sense Math and Social Studies Math and Art Current events Ratio and Proportion
Bring a little K-pop music to your class with this activity. Jason Kibbe, a terrific middle school math teacher in Chambersburg, PA, sent us an activity that he created for one of his stude...

How steep is this treadmill?

Algebra Number Sense Geometry Ratio and Proportion
  Photo from the Onion, America's Finest New Source. Women on Gym Treadmill Cranks Incline up to 90 Degrees  This is a very short activity designed to give students a more visual underst...
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