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Lesson Plan

Classify plane figures by examining their attributes

teaches Common Core State Standards CCSS.Math.Content.3.G.A.1
teaches Common Core State Standards CCSS.Math.Practice.MP1
teaches Common Core State Standards CCSS.Math.Practice.MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7

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Big Idea(s): We can classify two-dimensional shapes by their properties or attributes. This lesson builds on expanding students' ability to reason with shapes and their attributes. This task requires students to describe, analyze, and compare attributes of plane two dimensional figures to define a larger category and/or subcategory. Students are presented with a set of shapes and asked to use a Venn diagram to sort and classify the shapes by examining specific attributes. By understanding these attributes, students build toward the ability to reason and justify their classifications about how they can belong to different categories. Vocabulary: attributes, polygon, two-dimensional, plane shape, properties, features, subgroup, open figure, closed figure Special Materials: Pattern blocks (optional) Printout of geometric figures in lesson A copy of a blank Venn diagram
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