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)
   

Assessing Composing and Decomposing Shapes

1st Grade Math » Unit: Shapes Within Shapes
1st Grade Math » Unit: Shapes Within Shapes
Thomas Young
Waitsfield, VT
Environment: Suburban
 
Big Idea:

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

Standards:
 
Favorites (3)
 
Resources (14)
 
Reflections (1)
lesson image
   

Combine 3D Shapes

1st Grade Math » Unit: Geometry
1st Grade Math » Unit: Geometry
Lisa Murdock
Lakeland, FL
Environment: Urban
 
Big Idea:

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

Standards:
 
Favorites (6)
 
Resources (14)
 
Reflections (2)
lesson image 3d shapes
   

Take Apart 2D Shapes

1st Grade Math » Unit: Geometry
1st Grade Math » Unit: Geometry
Lisa Murdock
Lakeland, FL
Environment: Urban
 
Big Idea:

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

Standards:
 
Favorites (4)
 
Resources (13)
 
Reflections (1)
student journal
   

Finding Rectangles

1st Grade Math » Unit: Shapes, Blocks, and Attributes
1st Grade Math » Unit: Shapes, Blocks, and Attributes
Thomas Young
Waitsfield, VT
Environment: Suburban
 
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.

 
Favorites (6)
 
Resources (14)
 
Reflections (1)
lesson image
   

Combine More 2D Shapes

1st Grade Math » Unit: Geometry
1st Grade Math » Unit: Geometry
Lisa Murdock
Lakeland, FL
Environment: Urban
 
Big Idea:

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.

Standards:
 
Favorites (1)
 
Resources (12)
 
Reflections (1)
lesson image
   

Combine 2D Shapes

1st Grade Math » Unit: Geometry
1st Grade Math » Unit: Geometry
Lisa Murdock
Lakeland, FL
Environment: Urban
 
Big Idea:

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.

Standards:
 
Favorites (3)
 
Resources (13)
 
Reflections (1)
lesson image
   

Assessment of Fractional Halves and Fourths

1st Grade Math » Unit: Fraction Action Lessons
1st Grade Math » Unit: Fraction Action Lessons
Thomas Young
Waitsfield, VT
Environment: Suburban
 
Big Idea:

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.

 
Favorites (5)
 
Resources (25)
 
Reflections (1)
lesson image
   

Filling the Shadow

1st Grade Math » Unit: Shapes Within Shapes
1st Grade Math » Unit: Shapes Within Shapes
Thomas Young
Waitsfield, VT
Environment: Suburban
 
Big Idea:

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

 
Favorites (5)
 
Resources (15)
 
Reflections (1)
lesson image
   

Making new shapes with shapes

1st Grade Math » Unit: Understanding Shapes
1st Grade Math » Unit: Understanding Shapes
Jennifer Moon
Oklahoma City, OK
Environment: Urban
 
Big Idea:

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.

Standards:
 
Favorites (8)
 
Resources (16)
 
Reflections (1)
lesson
   

Ways to Make: Hexagon Edition

1st Grade Math » Unit: Shapes and Blocks
1st Grade Math » Unit: Shapes and Blocks
Amanda Cole
New Orleans, LA
Environment: Urban
 
Big Idea:

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

Standards:
 
Favorites (2)
 
Resources (15)
hankton
   

Same But Different

1st Grade Math » Unit: Shapes Within Shapes
1st Grade Math » Unit: Shapes Within Shapes
Thomas Young
Waitsfield, VT
Environment: Suburban
 
Big Idea:

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

 
Favorites (2)
 
Resources (22)
 
Reflections (1)
lesson image
   

Scavenger Hunt for 3D Shapes

1st Grade Math » Unit: Understanding Shapes
1st Grade Math » Unit: Understanding Shapes
Jennifer Moon
Oklahoma City, OK
Environment: Urban
 
Big Idea:

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.

Standards:
 
Favorites (4)
 
Resources (17)
 
Reflections (1)
lesson
   

Make New 3D Shapes

1st Grade Math » Unit: Geometry
1st Grade Math » Unit: Geometry
Lisa Murdock
Lakeland, FL
Environment: Urban
 
Big Idea:

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

Standards:
 
Favorites (5)
 
Resources (12)
 
Reflections (1)
lesson image
   

More and Fewer: Ways to Make

1st Grade Math » Unit: Shapes and Blocks
1st Grade Math » Unit: Shapes and Blocks
Amanda Cole
New Orleans, LA
Environment: Urban
 
Big Idea:

Students build composite shapes and number sense in this hands on lesson.

Standards:
 
Resources (15)
 
Reflections (1)
photo 6
   

Tangram Fun

1st Grade Math » Unit: Shapes, Blocks, and Attributes
1st Grade Math » Unit: Shapes, Blocks, and Attributes
Thomas Young
Waitsfield, VT
Environment: Suburban
 
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.

 
Favorites (3)
 
Resources (12)
 
Reflections (1)
lesson image
Common Core Math
 
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