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# Understand the size of customary measurement units by identifying benchmark objects

teaches Common Core State Standards 6.4H http://ritter.tea.state.tx.us/rules/tac/chapter111/index.html
teaches Common Core State Standards 3.7E http://ritter.tea.state.tx.us/rules/tac/chapter111/index.html
teaches Common Core State Standards 4.8B http://ritter.tea.state.tx.us/rules/tac/chapter111/index.html
teaches Common Core State Standards 3.M.2 http://www.doe.in.gov/standards/mathematics
teaches Common Core State Standards 4.M.2 http://www.doe.in.gov/standards/mathematics
teaches Common Core State Standards MAFS.4.MD.1.1 http://www.cpalms.org/Public/search/Standard
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.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1

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Big Ideas: Some attributes of objects are measurable and can be quantified using unit amounts. Units are specific amounts and relative within one system of measurement. In this lesson, students learn to associate a benchmark object with a specific customary measurement unit in order to maintain concrete understanding of the unit's size. Students will refer to benchmark objects in lessons 2-4 to make sense of units within measurement scenarios. Vocabulary: benchmark object Special Materials: 12-inch rulers - 1 per student scale or balance to measure ounces and pounds clock with second hand