Challenge students to a session of "The Prefix Relays." After presenting six prefixes, let students put the lesson to the test. Divide them into two relay teams. Provide each team with a pile of root words written on large cards. Also provide a pile of prefixes. The first player races to the finish line with a root word. The second player races with a prefix to attach to the root. If an actual word is not created, the player must race with the prefix back to the team, and the next player must try to complete the word. Play continues until one team has created six valid words. Following the relay, challenge students to write sentences using the words they created.