To teach proper defensive position and technique. Also, this helps players work on ball control. Finally, with dribblers running the length of the court and defenders
constantly moving, this is a great conditioning drill as well.
Three players set-up on the opposite foul line. One player is in the middle of the foul line the other two players are on either side on the foul line extended. Three more players setup on the half court line spaced the same way. Depending on the number of players on the team, one to three players set-up on the nearest foul line. Three more players are under the basket with basketballs.