Break it Down, Put it Together
Students will be able to create composite shapes from 2-D shapes. Students will be able to create new shapes from composite shapes.
Introduction (5 minutes)
- Let your students know that they are going to learn about composite shapes today.
- Explain that a composite shape is made out of two or more two-dimensional, or flat, shapes.
- Invite students to come and draw 2-D shapes on the board.
Explicit Instruction/Teacher Modeling (10 minutes)
- Draw a composite shape on the board, such as a house with a triangle and a rectangle.
- Invite students to come to the board to dissect the composite shape to show the 2-D shapes.
- Ask students to identify the 2-D shapes that make up the composite shape.
Guided Practice/Interactive Modeling (15 minutes)
- Pass out a pair of scissors, a ruler, and a sheet of paper to each pair.
- Ask the pairs to draw 2 composite shapes that are the same.
- Have your students dissect one of the shapes into 2-D shapes.
- Instruct your students to label the dissected part with its name.
- Put the spellings of various 2-D shapes on the board so students can spell without trouble.
- Have the pairs present their pairs of shapes to the class.
- Direct them to first show the composite figure and then the dissected parts.
Independent Working Time (15 minutes)
- Give your students the Shapes Composition worksheet to complete.
- Go over it as a class.
- Enrichment: Have students complete the My Kind of Town worksheet. Encourage them to identify the 2-D shapes in other real life objects.
- Support: Create composite shapes out of blocks. Have students break them down and identify the broken down 2-D shapes. Repeat this several times until students are able to draw this on paper.
Related Books and/or Media
- GAME: Shark Tangram Challenge
Assessment (5 minutes)
- Create a composite shape out of blocks, such as a castle.
- Have students draw which 2-D shapes make that larger composite shape.
Review and Closing (10 minutes)
- Divide your class into 5 groups.
- Draw 5 different composite shapes on construction paper, such as a boat, a house, a tiger, a backpack, and a chair. Assign each group one of these shapes.
- Have each group cut out the 2-D shapes that made the composite shape.
- Have one student from each group present what the 2-D shapes are that made the composite shape.