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Lesson Plan

Solve multiplicative comparison problems with an unknown product by using bar models

teaches Common Core State Standards CCSS.Math.Content.4.NBT.A.3
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.2
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Big Ideas: Understand that multiplicative comparisons focus on comparing two quantities by showing that a quantity is a specified number of times larger than the other. This lesson builds on students' understanding of multiplicative comparison. The task asks students to determine the height of a landmark structure in comparison to the given height of an ancient structure. Students will problem solve and use various mathematical models to solve a multiplicative comparison with an unknown product. This builds toward using equations with a symbol for the unknown to solve word problems with an unknown product. Vocabulary: multiplicative comparison, product, factor, bar model Special Materials: Base Ten Blocks Graph paper
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