Setting proper screens can start at an early level and is invaluable for helping offensive players create space, get open and score more easily.
With this youth basketball drill, teach your players that it is important to wait for the screening teammate to set, move toward the screen, cut off the screener and make it hard for the player that is screened out to chase.
Have the player with the basketball stand at the top of the key guarded by a coach. Put all of the other players in a line off to one side.
The first player in line comes and sets a screen on the coach as the player with the basketball rolls to the basket.
Pass the basketball to the screener and have them practice with the ball and a new screener.