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Lesson Plan

Understand the concept of an inequality by using a bar model

teaches Common Core State Standards CCSS.Math.Content.7.EE.B.4b
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4
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Big Idea: When using a bar model to help solve inequalities, the sign of the inequality helps us correctly interpret the solution. This lesson builds on students' work using bar models to represent and solve equations by looking at how this model transitions into the realm of inequalities. The task asks students to build four inequalities and corresponding bar models using given structures and rational numbers. Then students choose one inequality to expand into a scenario, solve using the bar model, and discuss how the solution they found must be interpreted as a solution of the inequality. This builds toward students' future work in fluently solving two-step inequalities and interpreting their solutions in grades 7 and 8. Vocabulary: variable, solution, bar model, inequality Special Materials: Supplementary handout, 1 copy per student (optional)
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