Masters of Gravity: Soap Box Derby Math & Science
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Video 2: Ratio and Proportion
Austin is having trouble interpreting the plans for his Soap Box Derby car. The plans use scale drawings and  he's having trouble understanding how items on the drawing relate to the actual car.  Bridget can't help so they go next door to ask Alex. He shows them a collectors model of a Soap Box Derby car and compares it to the one in his garage. By comparing the two, he explains proportion. He pulls out his plans and Austin measures the axle on the car and the plans. Using these two measurements they figure out the proportions of the plans.

 

Download the Teacher Guide (PDF file)  Lesson begins on page 23.

Online Activities for Ratio and Proportion