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Investigation: Create a recipe for a group

Lesson

Driving question

How can you use a recipe with fraction amounts to make samples for two different sized groups of people?

Key knowledge and understanding

  • Apply a scale factor to a practical situation.
  • Apply operations with fractions to real life situations.
  • Convert measurements in one unit to another.

Key success skills

  • Collaboration and teamwork
  • Problem solving
  • Flexibility and adaptability
  • Oral and written communication skills

Part 1: Find a recipe

Working on your own or in a group of 4-5 students, find a recipe from a recipe book or the internet that has fractional quantities for most of its ingredients.  Write your recipe on the handout provided and identify the parts of your recipe that are fractions.

Pause and reflect

  1. Does your recipe have enough fractional quantities?  If not, try a different recipe.
  2. Do you think you will be able to scale your recipe for a group?  If not, try a new recipe.
  3. Did you include the units with your ingredients?  Why do you think this is important?

Click on the handouts below to view and print.

 

Part 2: Scale your recipe

Scale your recipe so that you have exactly enough servings for everyone in your class (or neighborhood if you're doing this outside of school).  Identify the new quantities of each ingredient you’ll need.

Then, scale your recipe so that you have exactly enough servings for everyone in your group (or family if you're doing this on your own). Identify the new quantities of each ingredient you’ll need.

Pause and reflect

  1. Are the amounts of your scaled recipe practical?  (Are they measurable quantities? Will you have trouble getting any of the ingredients?)
  2. What tools will you use to measure your ingredients in the precise amounts?
  3. Do the quantities in your new recipe seem reasonable?  If not, you may wish to re-check your work.

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