## 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.

27 Lesson(s)

#### Knowledge in Action! Today you will find out if the students are understanding the idea of decomposing and composing shapes with pattern blocks.

#### Bob The Builder look out! In this lesson, students will learn how to compose a new shape by combining 3D shapes.

#### Let's break it down! In this lesson, students will look at a new shape and decompose it into smaller shapes.

#### What shape will you make? Kids can get creative with making composite shapes as they continue to explore composing new 2D shapes using a composite shape in this lesson.

#### 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.

#### Shapes, shapes, shapes! What new interesting shapes can you make when you combine 2D shapes? In this lesson students will compose new 2D shapes from multiple shapes.

#### My first graders have been studying the defining attributes of 2D shapes. They are going to love using toothpicks and marshmallows to present their knowledge of 2D and create 3D shapes.

#### Students will work with the idea of 1/2 and 1/4 fractions through an assessment task and an activity that has them breaking squares, rectangles and circles into 1/2 and 1/4 pieces.

#### Watch out Bob the Builder! In this lesson, students will use 3D shapes to make new 3D shapes.

#### Variety is the spice of life and the concept of the day as students fill the same pattern block outline three different ways.

Big Idea:

#### Students generate multiple ways of making a hexagon with this complex, hands-on task!

#### We have identified plane shapes in our classroom, learned shape attributes and vocabulary, and built 3D shapes from 2D plane shapes. I'm driving this unit home by having my students identify real-life 3D objects in our classroom.

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

Big Idea: