1. Activities to use with your students.

2. 1 st Grade Common Core Geometry Domain Reason with shapes and their attributes. 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. 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.

3. 3-D Shape Riddles Match each riddle to a shape. I’m a box for shoes, and cereal, too. Kids use me to play games with bats and bases. I’m a shape with no faces! I’ll hold your ice cream for you. You can wear me as a party hat, too. Inside me are sauces. Soup I can hold. Or, think about a paper towel roll.

4. 1.G.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. Harvey made a castle with geoblocks. What can you make with your geoblocks?

5. Harvey made a castle with geoblocks. How are the shapes Harvey used the same? How are they different?

6. Harvey made a castle with geoblocks. His friend made this shape. How are the shapes they used the same? How are they different?