Attributes of 2D Shapes

As we learned about the attributes of 2D shapes the students worked in cooperative groups to show examples and non-examples of circles, triangles, squares, and square rectangles. When sorting they had to verbally justify how they knew what were examples and what were non-examples by explaining the specific shape's attributes such as how many sides and vertices the shape has. The students then went on "gallery walks" to see how their classmates had sorted their shapes.