In groups of 3 players pratice boxing out on a 'Shot!' call.
2 players on Offense
Shooter takes shot and calls "Shot!" when ball leaves hands.
Defender sets up facing their mark and performs proper pivot and makes contact with their mark to "Box Out" - Calls out "Box!" when hearing "Shot!"
In 1-on-1 scenario players battle for the rebound.
If Defender gets rebound drill immediately switches to 2-on-1 fast break with shooter as the Outlet (calls "Outlet!" and positions his movement to get the pass in the lane and cuts to the middle - Defender, now on Offense, follows behind the pass and fills the opposite lane)
The man who was boxed out goes on Defense and must break down the floor to "Stop the Ball!"
After 2-on-1 fast break players switch roles and drill continues heading the opposite direction.
If shooter scores, he stays as shooter.
If Offense gets the rebound they play 2-on-1 for quick score and switch roles for next sequence (offensive rebounder becomes the shooter)
Focus by Defender should be on their mark while "sneaking a peak" at the player with the ball.
Proper footwork on "Shot!" call and making contact with their mark using their hips and arms out wide to create "rebounding zone".
Play the ball off the rim.
Once defender gets the rebound immediately turns attention to coming down solid on two feet, holding ball by the ear away from opponent. Chooses to dribble with proper cross-step to close the distance for a proper outlet pass and follows on offense immediatley.
Good team defence is five players guarding the ball, not five separate one-on-ones. The shell drill is where that starts, so here is how to teach help-side positioning and rotations from the first week of the season.
Rebounding is the least glamorous thing in basketball and one of the most decisive. It is also almost entirely a habit, which means it is entirely coachable.
Good spacing is only the start. The best modern offences teach players to attack the defence's rotations and play in a permanent 4-on-3 - here is how to coach that read.