Cooking Up Fractions
Topic: A Mathematics Project for Middle School Students.
Purpose: In this lesson students will
Reinforce their multiplying and dividing fractions skills by increasing and decreasing the serving size in a recipe.
Practice using search engines. Searching for recipes on their own to increase and decrease the recipe size.(Make sure fractions are in the recipes they choose.) .
Materials: Computers with Internet access.
Look at the recipe for Jam Thumbprints
Let's now re-write the directions to the recipe changing the numbers so the recipe makes sense.
You just found out there are not as many people coming over for dinner as you thought. Let's not waste food! Re-write the entire recipe so it serves 12.
- Re-write the entire recipe so it makes
three times as many cookies.
Let's Search for a recipe from KRAFTFOODS
- You are to search for a recipe called Blueberry Bubbleloaf in the Kraftfoods search engine.
- Hint: When searching for this recipe, try Blueberry for a keyword.
- Re-write the fractions to the Blueberry Bubbleloaf so it serves 4.
- Now re-write the directions to the recipe changing the numbers so the recipe makes sense.
Your next great recipe to search in Kraftfoods will beTomato and Basil Pasta
- Hint: For your keyword try Tomato. Watch out for several recipes in this category.
- You are having guests over for dinner. Re-write the recipe so it serves 4.
- Uh..Oh...You just recieved a phone call! More guests are coming over! Let's make sure you have enough food.
- Re-write the Fresh Tomato and Basil Pasta so it serves 24.
For a real challenge - Use the search engine below to find your own recipe.
- Find a recipe on the web that contains at least 3 fractions.
- Re-write the recipe for half as many people.
- Re-write the recipe for three times as many people as the original recipe.
- Include the URL of the recipe you find.
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This page was developed through
a teacher training and student technology council program sponsored by the
Center for Research on Parallel
a National Science Foundation-funded
Science and Technology
Thanks to the RGK
Foundation for its generous support.
© June 1997 Molly Silha
A special thanks to K. Herrmann for her version of Jam Thumbprints.