Unit Plan 27 (Grade K Math): Compose with Shapes
Compose larger shapes and pictures using triangles, rectangles, and squares; trace parts, check for no gaps or overlaps, and explore multiple ways to make the same whole.
Focus: Use triangles, rectangles, and squares to compose larger shapes and pictures; discuss multiple ways to make the same whole.
Grade Level: K
Subject Area: Mathematics (Geometry—Composing Shapes)
Total Unit Duration: 5 sessions (one week), 30–40 minutes per session
I. Introduction
Students compose (put together) familiar shapes to make new shapes and simple pictures (e.g., two triangles make a rectangle/square). They attend to sides, corners, and orientation, noticing there are many correct ways to make the same whole. By week’s end, students can build, draw, and explain how their pieces fit the target.
Essential Questions
- How can I compose small shapes to make a bigger shape or picture?
- Why might there be more than one way to make the same whole?
- What does it mean for shapes to match (no gaps/overlaps) when I build?
II. Objectives and Standards
Learning Objectives — Students will be able to:
- Compose larger shapes from triangles, rectangles, and squares using physical pieces.
- Draw or trace the composite shape and label the parts used.
- Explain why a solution matches (pieces touch edge-to-edge, no gaps/overlaps).
- Generate another way to compose the same target and compare.
Standards Alignment — CCSS Kindergarten (threaded across the unit)
- K.G.6: Compose simple shapes to form larger shapes.
- Mathematical Practices: MP.5 (use tools), MP.6 (precision), MP.7 (structure/parts), MP.1 (persevere).
Success Criteria — Student Language
- I can build a bigger shape using triangle/rectangle/square pieces.
- I can draw my composite and tell the parts I used.
- I can show my build matches with no gaps or overlaps and find another way.