Lesson Plan

Solve multiplicative word problems requiring conversion in the customary measurement system by using appropriate mathematical models

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.2 http://corestandards.org/Math/Content/4/MD/A/2
teaches Common Core State Standards CCSS.Math.Content.4.NBT.A.3 http://corestandards.org/Math/Content/4/NBT/A/3
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.2 http://corestandards.org/Math/Content/4/OA/A/2
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: Numbers, expressions, and measures can be compared by their relative values. Conversion from a larger unit to a smaller unit is a multiplicative comparison. A larger unit is a specified number of times larger than a smaller unit. This lesson builds on students' understanding of the relative sizes of units within a single system of measurement as well as their understanding of multiplicative comparison. Students are asked to compare jump lengths given in different units, and to use various strategies to convert measurements to a common unit in order to compare the jumps. This lesson builds toward solving multiplicative comparison word problems requiring conversion of metric measurements from a larger unit to a smaller unit. Vocabulary: multiplicative comparison, factor, product, two-column chart, per, iteration, unit, customary measurement system Special Materials: measuring tools, graph paper, linking cubes, base ten blocks
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