Ask students to guess what the things on the tray have in common. Allow them to make several guesses. If we continue to throw things away, we will run out of space for landfills. Soon we will not have place for the solid waste that we produce on this planet. It is everyone's responsibility to reduce the amount of waste that is produced by reusing and recycling materials whenever possible.
Groups brainstorm ways that common materials can be reused.
Divide class into groups of three or four students. Give each group a large sheet of paper, a pen and two or three of the items from the tray. Have them take one item at a time and brainstorm as many ways as possible to reuse that item. When groups are finished, ask them to share their ideas. If other students have additional ideas, ask groups to add the ideas to their lists.