In this activity, students will use proportions to convert units and to change the serving size of two different recipes. Students will learn to apply proportions through baking a chocolate cake by using a microwave. Baking a cake will take about 2 minutes depending on the microwave. Excite your students when you begin unit on proportion by telling them that that, they will be baking a cake in class. Use this activity at the end of your proportion unit or in the middle as a reward. If baking in class is not an option then assign the baking part for homework.
This is my favorite activity because students have fun with this lesson.
The lesson also includes notes and guided examples.
CCSS Standards Addressed in Lesson:
7.RP.A.3 Use proportional relationships to solve multistep ratio and percent problems.
6.RP Understand ratio concepts and use ratio reasoning to solve problems.
Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error.
Lesson Objective: The students will be able to
Convert one unit to another using proportions.
Change the amount of ingredient depending on the serving size.
I can calculate amount of ingredient based on the serving size.
I can convert one unit to another using a proportions.
Vocabulary: Proportion, Serving size, Unit of measurement.
Motivation: To engage and motivate ask students ask questions similar to listed below.
Can you name your favorite dessert?
Have you helped someone bake a cake?