Lesson plan

Understand and solve unit rate problems by using graphs of equivalent ratios

teaches Common Core State Standards CCSS.Math.Content.6.RP.A.3 http://corestandards.org/Math/Content/6/RP/A/3
teaches Common Core State Standards CCSS.Math.Content.6.RP.A.3b http://corestandards.org/Math/Content/6/RP/A/3/b

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Big Ideas: Unit rates answer the question how many (or how much) for 1. Unit rates are easier for us to generalize and extend (important for comparison – shopping; athletic competitions) This lesson builds on students’ understanding of rates by using ratio graphs to extend and compare rates to solve real world problems. Ratio graphs show the multiplicative relationship between rates being compared and can help extend rate patterns. It is important for students to recognize the quotient of each equivalent rate on the graph is the “constant” unit rate because this is the foundation for future work with slope of a line. Vocabulary: rate, unit rate, ratio graph, constant Special Materials: graph paper (optional)