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Lesson Plan

Find the area of rectangles by applying the standard formula

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.3 http://corestandards.org/Math/Content/4/MD/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8
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Big Ideas: Formulas can be used to calculate the area of rectangles. Multiplication can be used as an efficient strategy for calculating the area of a rectangle. In third grade, students explored area using concrete objects and linking this understanding to their developing knowledge of multiplication. In this lesson, we continue building this understanding by using the formula that is used to calculate area (A=l x w) of rectangles. Students uncover the relationship between the area of rectangles and the formula by building rectangles that share a common area but have different dimensions. They look for patterns in their results that illustrate the connection between the dimensions of a rectangle and its area. Vocabulary: area, formula, dimension, length, width, unit, square unit Special Materials: 1 inch square tiles graph paper
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