Lesson plan

Represent a real-life situation by writing a single-step expression that includes a variable

teaches Common Core State Standards CCSS.Math.Content.6.EE.B.6 http://corestandards.org/Math/Content/6/EE/B/6
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

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Big Ideas: Real world situations can be represented by mathematical expressions. Variables can be used to represent unknown or changing quantities. This lesson builds on students' use of algebraic expressions to represent mathematical phrases (6.EE.2) by extending their use to represent real-life situations. This lesson is intended to be given prior to explicit instruction on the standard. In this task, students read a story about a boy’s birthday gifts. Through the task, students conceptualize that even when there is unknown information about a quantity, it can still be written mathematically as an expression by including a variable. This concept builds toward the skill of solving for variables in real-life situations. Vocabulary: expression, variable Special Materials: Juan’s Birthday Story - 1 copy per student