Lesson plan

Justify multiple solutions to an inequality by substituting for an unknown

teaches Common Core State Standards CCSS.Math.Content.6.EE.B.5 http://corestandards.org/Math/Content/6/EE/B/5
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Big Idea: A solution is a number that makes an inequality true when substituted for an unknown. There is more than one solution to an inequality. This lesson builds on solving equations using solution sets by asking students to solve for variables in inequalities using a solution set. In this task, students will consider a real-life situation that could be represented as an inequality and students will recognize that more than one solution is possible. This concept builds toward graphing inequalities and solving for variables in inequalities without the use of a solution set. Vocabulary: inequality, variable, substitute, solution Special Materials: none