## 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); for a wide variety of shapes; build and draw shapes to possess defining attributes.

30 Lesson(s)

#### Clean Up this Mess! The classroom shapes are in one big heap. Students will work in teams to come up with a way to sort the shapes by attributes and create a visual representation to model their thinking

#### This is a great introduction to geometry in first grade or could be used as a Kinder lesson! Students use attributes to "prove" that they have a given shape.

#### Students will look for as many rectangles as they can from a given set of shapes. The students will find as many solutions as they can.

Big Idea: