Lesson plan

Determine non-proportional relationships between independent and dependent variables

teaches Common Core State Standards CCSS.Math.Content.6.EE.C.9 http://corestandards.org/Math/Content/6/EE/C/9
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8

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Big Ideas: Any number or algebraic expression can represent a range of numbers, a single number, or a group of varying numbers. Independent and dependent variables may have a proportional relationship, and that relationship can be used to predict unknowns and solve problems. This lesson builds on students’ work with dependent and independent variable. This task looks at the perimeter and area of a doubling figure. Students are asked to describe and show the relationship between shape number and perimeter, also the relationship between shape number and area. Students will recognize that while both values increase, they do not increase proportionally. The mathematical concepts in this lesson build toward students’ future work with expression, equations and proportional reasoning in grades 6-8. Vocabulary: direct proportion (direct variation)