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- 1.G.A.1Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); for a wide variety of shapes; build and draw shapes to possess defining attributes.
- 1.G.A.2Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.
- 1.G.A.3Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.

Sorting Shapes

1st Grade Math

» Unit:

Shapes Within Shapes

Big Idea:Clean Up this Mess! The classroom shapes are in one big heap. Students will work in teams to come up with a way to sort the shapes by attributes and create a visual representation to model their thinking

Sort 2D Shapes

1st Grade Math

» Unit:

Geometry

Big Idea:In this lesson, students will be able to reason with shapes and sort them by their defining attributes.

Prove it!

1st Grade Math

» Unit:

Shapes and Blocks

Big Idea:This is a great introduction to geometry in first grade or could be used as a Kinder lesson! Students use attributes to "prove" that they have a given shape.

Properties of Plane Shapes

1st Grade Math

» Unit:

Understanding Shapes

Big Idea:I love graphic organizers. My students will increase their vocabularies by learning more 2D shape terms through the use of a graphic organizer.

Sorting 3D Shapes

1st Grade Math

» Unit:

Geometry

Big Idea:Shapes, shapes, everywhere! In this lesson, students will sort and classify 3D shapes by their defining attributes of a sphere, cube or cylinder.

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.

Riddle Me This

1st Grade Math

» Unit:

Shapes and Blocks

Big Idea:Students apply what they know about shapes to this fun writing activity!

Three Dimensional Shapes

1st Grade Math

» Unit:

Geometry

Big Idea:Put on your 3D glasses, sit back and enjoy the show! In this lesson, children will look at, touch, and arrange shapes, and discover that though the positions of shapes may change, their attributes do not change.

Student, Student, What Do You See?

1st Grade Math

» Unit:

Shapes Within Shapes

Big Idea:Most bears are getting ready to hibernate this time of year. NOT IN MY ROOM! These little brown bears will be on the hunt for shapes they see.

Here are the 3D Shapes That I Know

1st Grade Math

» Unit:

Shapes and Blocks

Big Idea:Students review solid shape names from Kindergarten while also learning the language to explain their key attributes.

Identifying Plane Shapes

1st Grade Math

» Unit:

Understanding Shapes

Big Idea:First graders begin to learn about plane shapes in Kindergarten. This lesson will serve as review of plane shapes' characteristics and extend into practice in categorizing shapes by defining attributes.

Tangram Fun

1st Grade Math

» Unit:

Shapes, Blocks, and Attributes

Big Idea:Students will work in teams and use tangrams to cover outliners of shapes. This 1st and 2nd grade lesson will combine students from each grade and ask them to work together as a team to solve these complex tasks.

Venn Diagrams With Attribute Blocks

1st Grade Math

» Unit:

Shapes, Blocks, and Attributes

Big Idea:Today the students will use Venn Diagrams to identify which shapes fit two stated rules. After a whole group introduction, students will have the chance to work independently on this activity.

Same But Different

1st Grade Math

» Unit:

Shapes Within Shapes

Big Idea:Today, this common student answer will be the accepted one as students try to find different ways to fill in a hexagon.

Looking At Three Dimensional Shapes

1st Grade Math

» Unit:

Shapes, Blocks, and Attributes

Big Idea:Today your students will be introduced to 3-D shapes and investigate their defining attributes. The class will also play a game where they use their sense of touch to determine a hidden block.

1.G.A.1

Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); for a wide variety of shapes; build and draw shapes to possess defining attributes.

1.G.A.2

Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.

1.G.A.3

Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.