Category: Ratio and Proportion

Whole lot of cookies

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?

Buy, buy, buy and ship (8 ideas)

Here comes Black Friday, Small business Saturday, Cyber Monday and Giving Tuesday.  It’s a crazy time of year.  Use all of that shopping to educate your students about good deals and how shoppers can be fooled. Is this really 70%…

Thanksgiving, shopping, football and giving

How should I cook my turkey? – Students judge timing, cost, tastiness, and quantity necessary as they plan for the feast. 4.MD.1, 5.NBT.7, 4.MD2, 6.RP.3, 6.NS.3, 7.NS.3  Great video on a deep frying fire with William Shatner. Shopping season already! – Students will…

Lots of Cranberries

In this activity, students learn about how cranberries are grown and harvested; estimate their size and quantities; and see what they can deduce from published statistics.

How big could this mid-term election be?

Will the November 8th 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 tendencies, and make predictions about this year’s voter turnout.

I need help raking my leaves

In this activity students see the inverse relationship between number of workers and time to complete the whole job. They graph hyperbolas and consider how long the extreme condition of zero people raking might take to complete the job.  

Halloween activities

14 Activities How well can you predict your candy haul? – Students consider how to determine their best predictions of their candy haul.  The math ideas of measurement error and percent error are introduced.  Students then predict their own Halloween…

Inflation and the cost of gasoline

In 1980, a gallon of gas 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 with $1.22 than you can buy today?

Participation in Halloween activities

Students analyze the ratios and percents of population, participation, and money spent in honor of October 31st.  This activity takes kids through finding parts of wholes as well as ratio, percents and proportion problems.  

Giant Pumpkins 2022

Sts use proportions to calculate the quantities of pumpkin puree and the number of pumpkin pies that could be made from one of these giant pumpkins.

Are hurricanes getting stronger and more frequent?

Updated! In this updated hurricane activity, we’ve ask students to examine the Saffir-Simpson hurricane wind scale and consider what other elements besides this ranking may contribute to the devastation that is caused by tropical storms. Students read about hurricane classfications…

Little Amal

With refugees trying to survive hardships by traveling away from their homes, the story of Little Amal is powerful and touching. There is lots of math in creating an 11 foot tall puppet that can be controlled by 3 people and show fear, surprise, wonder, and generally the humanity of refugees.  Bring the story of Amal to your classroom with this timely art.

But it didn’t sell?

<span data-mce-type=”bookmark” style=”display: inline-block; width: 0px; overflow: hidden; line-height: 0;” class=”mce_SELRES_start”></span> A&W offered a bigger, tastier burger but it didn’t succeed in grabbing customers away from the hugely popular McDonald’s quarter pounder. The A&W third pounder hamburger cost the same…