CCSS.Math.Content.K.G.B.6
The standard
Compose simple shapes to form larger shapes.
Common Core State Standards for Mathematics · Geometry
What this standard means
Students need to put simple shapes together to make a new, larger shape. They should use real pieces, turn them, slide them, and line up full sides when needed. They also need to name what they made and explain which smaller shapes they used.
Mastery looks like a child choosing pieces on purpose, trying more than one arrangement, and saying things like, “Two triangles made a square.” Common sticking points are leaving gaps, overlapping pieces, matching only corners, or thinking a shape changes just because it is turned.
Ways to teach it
- Give students pattern blocks and ask them to build a hexagon using triangles, then using a trapezoid and triangles.
- Ask, “What bigger shape can you make with two triangles, and how do you know?”
- Show a composed shape for five seconds, cover it, and have students rebuild it with foam shapes.
- Look at floor tiles or a quilt photo and have students find larger shapes made from smaller shapes.
Plan a lesson for CCSS.Math.Content.K.G.B.6
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Related standards
- CCSS.Math.Content.K.G.B.5
Model shapes in the world by building shapes from components (e.g., sticks and clay balls) and drawing shapes.
- CCSS.Math.Content.K.G.B
Analyze, compare, create, and compose shapes.
- CCSS.Math.Content.3.G.A
Reason with shapes and their attributes.
- CCSS.Math.Content.1.G.A.2
Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectang...