## Lesson: Identify Plane Shapes and Solid Shapes

Developing the Concept

Your children gained practice in sorting and classifying plane shapes in the “Introducing the Concept” lesson. They will now compare solid shapes and relate plane shapes to the faces of solid shapes.

**Materials:** Geometric solids or manipulatives in the shapes of cubes, pyramids, rectangular prisms, cones, cylinders, and spheres.
Have 1 manipulative for every 4 or 5 children; the following objects: a small rubber ball, an unopened tissue box shaped like a rectangular prism, a cube-shaped box, a can, a cone-shaped party hat and a pyramid (you might be able to find a pyramid candle); copies of the Solids (PDF file) and Face Match (PDF file) worksheets for every child and an overhead copy of each paper.

**Preparation:** Make a copy of each worksheet for every child as well as an overhead copy. Have the objects set out where they will be visible to the children. Divide children into groups of 4 or 5 (depending upon the number of manipulatives available).

**Prerequisite Skills and Concepts:** Children should be familiar with the names and attributes of plane shapes.

Begin by asking children to name four basic plane shapes. Have them describe the number of corners and sides for each shape.

Give each child a copy of the Solids (PDF file) worksheet and put the transparency copy on the overhead.

**Wrap-Up and Assessment Hints**

To assess children's knowledge of plane and solid shapes, play “I'm thinking of…” Give each child a set of shape cards. Describe the attributes of a solid or plane shape in the following manner, “I'm thinking of a solid shape with one round face.” Check to see that children hold up the correct card (cone). Repeat, giving clues for each shape.