Lesson plan

8. Use the distributive property to write equivalent expressions (FP)

teaches Common Core State Standards CCSS.Math.Content.7.EE.A.1 http://corestandards.org/Math/Content/7/EE/A/1
teaches Common Core State Standards CCSS.Math.Content.7.EE.A.2 http://corestandards.org/Math/Content/7/EE/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Fluently rewrite algebraic expressions using the distributive property.

This lesson helps to build procedural skill with the distributive property. Area/tape diagram models are used here because they help students understand what it looks like to use the sum as a factor. This work develops students' understanding that the distributive property holds for any expression, even those with rational number cofficients and unknown values.

Students engage in Mathematical Practice 7 (look for and make use of structure) as they construct area models to help visualize different but equivalent forms of expressions.

Key vocabulary:

  • equivalent expressions
  • distributive property