Lesson plan

Remote Control Racing: Using equations to describe and compare speeds

teaches Common Core State Standards CCSS.Math.Content.7.RP.A.2 http://corestandards.org/Math/Content/7/RP/A/2
teaches Common Core State Standards CCSS.Math.Content.7.RP.A.2c http://corestandards.org/Math/Content/7/RP/A/2/c
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Students will learn to write equations to represent the proportional relationship between distance and time when given a constant speed. This lesson builds on students’ work with the constant of proportionality in graphs and equations. Students will graph data in a table showing the speed of two remote control cars. Then they will write an equation for each car and describe the distance between the cars at any given time. The mathematical concepts in this lesson build toward students’ future work with slope. Big Idea: The constant of proportionality relates the independent and dependent variables in an equation. Vocabulary: constant of proportionality, equation, dependent variable, independent variable Special Materials: graph paper, rulers