# 6. Classify shapes into categories and subcategories (A)

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: Classify shapes into categories and subcategories to understand the relationship between attributes.

This lesson provides an opportunity for students to apply their knowledge and understanding of subcategories of two-dimensional figures to a real-life  situation. Students are asked to label a diagram of a garden based on the shape of each garden bed.

Key Concept students will use:

• Attributes belonging to a category of two-dimensional shapes also belong to all subcategories of that category.

Skills students will use:

• Shapes in different categories (rhombuses, rectangles, etc.) may share attributes; (Grade 3, Unit 13)
• Objects have geometric properties that allow us to create categories of objects.

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
• parallel
• perpendicular
• subcategory
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