This page provides samples of 1st Grade Geometry Activities aligned with the Common Core State Standards. All activities are suitable for use in Math Centers, small group or whole class settings and are designed to provide opportunities for students to communicate their reasoning and mathematical thinking. All sample files are in PDF format. Sample activities listed in blue are available for immediate download. Activities listed in **grey are included in our 1st Grade Math Centers eBook.
Reason with shapes and their attributes
1.G.A.1 Distinguish between defining attributes (e.g. triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.
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.
1.G.A.3 Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.