Lesson plan

Show different shapes with the same area by manipulating square tiles

teaches Common Core State Standards CCSS.Math.Content.3.MD.C.5 http://corestandards.org/Math/Content/3/MD/C/5
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.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: Different shapes can have the same number area. Area is measured in square units. This lesson builds on students' work with tiling unit squares on shapes to determine their area. This task uses a research scenario where students need to determine the various ways that chocolate squares can be arranged into rectangular boxes. Students are presented with chocolate squares to arrange as well as to recognize the number of rows and columns in their arrangements. By thinking of area as an attribute that applies to all plane figures, students will continue to build their conceptual understanding of area. The mathematical concepts in this lesson build toward students' future work with multiplying side lengths to find area of rectangles. Vocabulary: attribute, length, width, square units, area Special Materials: Square Tiles