Students predict what shape they will see when they make various impressions of 3-dimensional objects in sand. For example, the top of a cylinder forms a circle, its side formsa rectangle. Students outline a triangle, a square, and a circle on the floor with string or tape. Students work through the Shapetown lesson that is described in the First Four Standards of this Framework . They explore properties of two-dimensional shapes by applying the fundamental concepts of Venn diagrams.
Students make shapes with their fingers and arms.
The Shapes Game by Paul Rogers. Each page shows a different shape and many of the things in the world that have that shape. As each page is read, the children find other objects in the room that have the same shape. Students listen to and draw illustrations for the story The Greedy Triangle by Marilyn Burns. A good open-ended assessment for this critical indicator is to ask students to sort a collection of shapes into groups, explaining their reasoning.