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- 3.G.A.1Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.
- 3.G.A.2Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part is 1/4 of the area of the shape.

3.G.A.1

Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

Polygons: Introduction & Investigation

3rd Grade Math

» Unit:

Geometry in Architecture

Big Idea:Interacting with polygons and testing the definitions can be engaging, fun and build a powerful, individualized understanding. (Lesson updated: January 6, 2015)

Jennifer Valentine

Urban Env.

13 Resources

14 Favorites

13 Resources

14 Favorites

Quadrilateral Or Parallellogram?

3rd Grade Math

» Unit:

Geometry

Big Idea:Students discover the differences between quadrilaterals and parallelograms with everyday items found in the classroom.

Diane Siekmann

Urban Env.

9 Resources

7 Favorites

9 Resources

7 Favorites

Finding Rectangles

1st Grade Math

» Unit:

Shapes, Blocks, and Attributes

Big Idea:Students will look for as many rectangles as they can from a given set of shapes. The students will find as many solutions as they can.

Thomas Young

Suburban Env.

14 Resources

9 Favorites

14 Resources

9 Favorites

Searching for Shapes in Architecture (Day 1)

3rd Grade Math

» Unit:

Geometry in Architecture

Big Idea:Learning the names and attributes of polygons while looking at buildings of the world will make them unforgettable!

Jennifer Valentine

Urban Env.

27 Resources

9 Favorites

27 Resources

9 Favorites

Jeopardy Review

3rd Grade Math

» Unit:

More Problem Solving Practice

Big Idea:Games make problem solving fun and exciting.

Sarah Maffei

Urban Env.

10 Resources

12 Favorites

10 Resources

12 Favorites

Great Buildings of the World: Create Your Own! (Day 1)

3rd Grade Math

» Unit:

Geometry in Architecture

Big Idea:Creating their own building is a hands-on, minds-on way for students to explore how polygons create 3D solids.

Jennifer Valentine

Urban Env.

19 Resources

9 Favorites

19 Resources

9 Favorites

How Can I Find Similar Attributes ?

3rd Grade Math

» Unit:

Geometry

Big Idea:Shapes fit into all kinds of categories!

Sarah Maffei

Urban Env.

12 Resources

14 Favorites

12 Resources

14 Favorites

Creating a Summer Review Packet (Day 1)

3rd Grade Math

» Unit:

Review Activities

Big Idea:Students that can write their own story problems, and create math situations that require thought and perseverance to solve, are students that understand. This engaging activity reviews all of the third grade concepts and creates a review packet as well!

Michelle Marcus

Suburban Env.

8 Resources

21 Favorites

8 Resources

21 Favorites

What Makes a Shape? Analyzing and Script Writing

3rd Grade Math

» Unit:

Going Batty Over Measurement and Geometry

Big Idea:Students will use the bat houses we built as examples of various quadrilaterals.

Michelle Marcus

Suburban Env.

9 Resources

3 Favorites

9 Resources

3 Favorites

2D & 3D Shapes

3rd Grade Math

» Unit:

Geometry

Big Idea:Real world examples help make the attributes of these shapes less abstract.

Sarah Maffei

Urban Env.

18 Resources

4 Favorites

18 Resources

4 Favorites

Finding Angles

3rd Grade Math

» Unit:

Geometry

Big Idea:The three types of angles, right, acute, and obtuse, exist in our everyday surroundings. Students find these angles using classroom items.

Diane Siekmann

Urban Env.

10 Resources

5 Favorites

10 Resources

5 Favorites

Great Buildings of the World: Create Your Own! (Day 2)

3rd Grade Math

» Unit:

Geometry in Architecture

Big Idea:Creating their own building is a hands-on, minds-on way for students to explore how polygons create 3D solids.

Jennifer Valentine

Urban Env.

22 Resources

5 Favorites

22 Resources

5 Favorites

Geometry Shape Book

3rd Grade Math

» Unit:

Geometry

Big Idea:Students develop their understanding of the importance of different 2-dimensional shapes by finding real world examples.

Diane Siekmann

Urban Env.

9 Resources

2 Favorites

9 Resources

2 Favorites

Polygons - Explore the Possibilities

3rd Grade Math

» Unit:

Geometry in Architecture

Big Idea:Online drawing programs allow students to explore many possibilities with polygons!

Jennifer Valentine

Urban Env.

13 Resources

5 Favorites

13 Resources

5 Favorites

Differences With Shapes

3rd Grade Math

» Unit:

Geometry

Big Idea:Differences between shapes are determined through measurement skills.

Diane Siekmann

Urban Env.

12 Resources

3 Favorites

12 Resources

3 Favorites

3.G.A.1

Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

3.G.A.2

Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part is 1/4 of the area of the shape.