If the offensive player gets the rebound, the defender has to do five push-ups. They get the message soon about the importance of boxing out.
This drill stresses boxing out and rebounding, as well as low post offensive power moves. This is a good drill for your inside post players. Have three players under the basket. The coach or a manager shoots the ball up. All three players work for position and go for the rebound. The player who gets the rebound powers the ball back to the hoop while the other two are on defense and try to stop him.
No dribbling is permitted except for a one-bounce dribble adjust. The offensive player should be thinking three-point play (the old fashioned three pointer), the basket and a foul.