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Lesson Plan

Classify polygons by comparing their properties

teaches Common Core State Standards CCSS.Math.Practice.MP1
teaches Common Core State Standards CCSS.Math.Content.3.G.A.1
teaches Common Core State Standards CCSS.Math.Practice.MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7
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Big Ideas: We can classify two-dimensional shapes by comparing their properties or attributes. Shapes with the same attributes can be grouped to make a larger category. This lesson builds on students’ ability to recognize and draw shapes with specific attributes. This task requires students to compare attributes of polygons. Students are presented with a set of shapes in which they have to use a Venn diagram to sort based on specific attributes. By understanding these attributes, students then are able to justify their classifications of polygons. Vocabulary: attributes, polygon, plane shape, properties, open plane figure, closed plane figure, Venn diagram Special Materials: Pattern blocks (optional) Printout of geometric figures in lesson A copy of a blank Venn diagram
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