Ratio and Proportion

Grade

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Winter Solstice 2023

Number Sense Geometry Math and Science Ratio and Proportion
It is really dark out now.  Why is that? Students appreciate how their latitude effects the darkness of their late afternoon location as they study the earth's tilt and the logic of da...

Wind chill

Algebra Number Sense Math and Science Ratio and Proportion
  The weather forecasters tell us what the wind chill temperature will feel like. How do they figure out that number? In this activity students use the National Weather System chart ...

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...

Lots of Cranberries

Geometry Math and Food Holidays and Annual Events Ratio and Proportion
 The harvest must be nearing completion now and growers are selling their product to make cranberry juice, jelly, sauce, and of course, fresh berries in time for Thanksgiving. In this activit...

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...

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...

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...

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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