# 5. Organize categories and subcategories of objects (FP)

teaches Common Core State Standards CCSS.Math.Content.5.G.B.3 http://corestandards.org/Math/Content/5/G/B/3
teaches Common Core State Standards CCSS.Math.Content.5.G.B.4 http://corestandards.org/Math/Content/5/G/B/4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Create and organize categories and subcategories of two-dimensional figures.

This lesson helps to build fluency with classifying two-dimensional figures using a variety of attributes. Flowcharts and Venn diagrams used here because they highlight relationships between figures. This work develops students' understanding that attributes belonging to a category of two-dimensional shapes also belong to all subcategories of that category.

Students engage in Mathematical Practice 7 (look for and make use of structure) as they use and create organized structures for categories of shapes, to visualize the relationships between different plane figures.

Key vocabulary:

• attribute
• equilateral
• flowchart
• isosceles
• kite
• parallelogram
• rectangle
• rhombus
• scalene
• square
• subcategory
• trapezoid
• Venn diagram

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