Tic-Tac-Toe for early finishers. When students have finished an assigned activity, they select additional activities from the tic-tac-toe board. When they complete 3 in a row, they earn some sort of reward.
Good Reminders: 10 Ways to Sabotage Your Classroom Managment: If you are having classroom management problems, take a look at this article, which explains what NOT to do, and the more effective practices you should try instead.
CLASSROOM Management: Effectively manage your new middle school or high school classroom by establishing these five classroom routines in the beginning of the year. First week classroom routines for effective classroom management.