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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...

How big could this mid-term election be?

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

Will the November 8th 2022 election bring record number of voters to the polls? Students get a chance to understand what the usual percentage of voters is, look for trends and central tende...

I need help raking my leaves

Algebra Number Sense Current events Ratio and Proportion

Brian has spent too much time thinking about his leaves. He's worried about raking them alone and thinking about how long the job would take if people helped. In this activity students see the inve...

The size of chocolates

Number Sense Geometry Math and Food Holidays and Annual Events

In this activity students assume that all of our pieces of chocolate are about the same thickness and proceed to approximate their volumes by comparing only their surface areas. Consider sh...

Inflation and the cost of gasoline

Algebra Number Sense Math and Science Math and Social Studies Ratio and Proportion

In 1980, one gallon of gasoline costs $1.22. Today's prices are a lot higher. Is that because the price has gone up or because in 1980 you could buy a lot more than you can buy today for...

Giant Pumpkins 2022

Number Sense Math and Food Ratio and Proportion Data and probability Wow factor

5 pound pumpkin compared to giant pumpkin Let your students marvel at World Record winning giant pumpkins as they use proportions to calculate the quantities of pumpkin puree and th...

Do teams that spend a lot win a lot?

Algebra Number Sense Sports Data and probability

In this activity students compare team wins with team salaries in the four major North American sports ... the NBA, NFL, MLB and NHL. Students use data from recent seasons to create scatter ...

How much caffeine are you consuming?

Algebra Number Sense Math and Science Math and Food Ratio and Proportion Wow factor

Did you know that there is an amount of caffeine that is too much for the growing brain of a teenager? We did some research and have asked students to examine the sources of caffei...

How many gumballs are there?

Number Sense Geometry Math and Food Data and probability

Gumball Machine Problem from Brian Marks on Vimeo This problem is a little puzzle to get your students thinking, estimating, and calculating. We've given you a pdf file w...

Willy Makeit or Betty Wont

Number Sense Geometry Ratio and Proportion Funny Wow factor

I have to go to the bathroom pretty badly. I have to admit that I have been holding it in for a while. Finally! I see a bathroom sign! Wait ... it is in kilometers? How...

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