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Lesson Plan

Select appropriate units for measuring area by reasoning about the number of units and the size of each unit

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teaches Common Core State Standards CCSS.Math.Content.3.MD.C.5a http://corestandards.org/Math/Content/3/MD/C/5/a
teaches Common Core State Standards CCSS.Math.Content.3.MD.C.5b http://corestandards.org/Math/Content/3/MD/C/5/b
teaches Common Core State Standards CCSS.Math.Content.3.MD.C.6 http://corestandards.org/Math/Content/3/MD/C/6
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8

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Big Ideas: Area is an expression of how much surface is covered. Some units are a better representation of a measurement. This lesson builds on students' ability to differentiate and apply different units for measuring area. The task in this lesson helps students develop strategies for determining appropriate units to measure area by reasoning about the size of the unit and the size of the figure. Students develop stronger number sense by reasoning about the inverse relationship between quantities and a unit's size. This builds toward a deeper understanding of area measurement and prepares students to develop strategies to determine the area of a figure. Vocabulary: square unit (unit square) square centimeter square inch square foot square meter appropriate unit Special Materials: sticky notes square centimeter tiles square inch tiles square foot tiles (large construction paper cut into 1 foot squares works well) centimeter grid paper inch grid paper
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