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Activity Overview

Students use proportional reasoning skills to increase a family-size recipe to a banquet-size recipe.

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Before the Activity

See the attached PDF file for detailed instructions for this activity
Print pages 31 - 37 from the attached PDF file for your class
Realize that when multiplying a recipe to make a bigger amount, the proportion of each ingredient must remain the same
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During the Activity

Distribute the pages to the class.

Follow the activity procedures:

Determine how many people a family-size recipe for a casserole will feed (6)
Determine how many family-size recipes it takes to feed 20 people
Create a table of ingredients and the amounts used
Calculate the amount of each ingredient required to feed 20 people and tabulate the results
Create charts showing the recipe for a casserole for 6 people and for 200 people
List the ingredients and calculate the amount of each ingredient needed
Find the number of pans needed to cook casserole for 200 people
Write an explanation for the calculations
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After the Activity

Students present the completed charts to the class.

Review student results
As a class, evaluate the charts for similarities and differences
Re-teach concepts as necessary