Lesson plan

Compare and convert customary units of weight by creating conversion tables

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.1 http://corestandards.org/Math/Content/4/MD/A/1
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.1 http://corestandards.org/Math/Content/4/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8

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Big Ideas: The same measurement value can be represented in multiple ways (e.g. 2 pounds = 32 ounces) Units of measurement can be compared by their relative values Multiplicative comparisons show the relationship between units of measurement (1 pound is 16 times as much as 1 ounce, 1 foot is 12 times as much as 1 inch) In this lesson, students continue to create conversion tables with a focus on customary measures of weight. In third grade, students practiced measuring mass with metric units; in this lesson they refer to benchmark objects identified in Lesson 1 to understand the relationship between the customary units of pounds and ounces. Conversion tables will also be used to reinforce the multiplicative comparison of two units of measurement. Vocabulary: pound, ounce