Lesson plan

Solve linear equations by combining like terms

teaches Common Core State Standards CCSS.Math.Content.8.EE.C.7 http://corestandards.org/Math/Content/8/EE/C/7
teaches Common Core State Standards CCSS.Math.Content.8.EE.C.7b http://corestandards.org/Math/Content/8/EE/C/7/b

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Big Ideas: Terms that are alike have the same variable raised to the same power. Only terms that are alike may be combined. Constants and coefficients of variables may not be combined with each other. This lesson focuses on collecting and combining terms that are alike to simplify and ultimately solve equations. Students collect variables assigned to different food items then determine how many of each item is ordered by a fictitious group. Students must also determine if the girls paying for the meal have enough money. This lesson uses only integers. Subsequent lessons will provide students opportunities to work with decimals and fractions. This lesson builds on the previous lesson on the distributive property and is a building block for solving systems of equations. Vocabulary: coefficient, variable, exponent, like terms