Box out drill:

Have four pairs of players spread out around the perimeter about seventeen feet from basket. (The fifth pair waits under the basket to rotate in.) The four defensive players position themselves between the basket and the offensive player, back to the basket, facing the offensive player. The coach puts up a shot; the defensive players box out and go for rebound. Teach the players to Locate the offensive player, Rotate and assume a good box out stance, and Jump for the rebound. (Locate, Rotate, and Jump!) Have the players rotate position once around then switch offense and defense and repeat.