Lesson plan

Decompose complex shapes by breaking the shapes apart into non-overlapping rectangles

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teaches Common Core State Standards 3.MD.C.7.d http://corestandards.org/Math/Content/3/MD/C/7/d
teaches Common Core State Standards 3.OA.B.5 http://corestandards.org/Math/Content/3/OA/B/5
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Big Ideas: Complex shapes are made up of simpler, less complex shapes such as rectangles. Up to this point students have learned many strategies to find the area of a rectangle. As students approach learning how to find the area of rectilinear figures, it is important that they have a good understanding of the word decompose and how to decompose a complex shape into simple shapes. This lesson focuses on developing this understanding. This lesson builds towards students' work with determining the area of rectilinear figures in future lessons. Vocabulary: decompose, compose, complex shape, simple shape, rectilinear figure Special Materials: pattern blocks