Players line up around the edge of the 3 point line with a defender behind each of them. Each of the attackers has a ball with their back to the basket. The coach calls out one of the defenders names and they tap the attacker in front of them on the shoulder.
The attacker turns to face the defender and they play a 1 v 1. The attacker has only 3 dribbles, whilst the defender has to try and either stop the dribble, box out or close the baseline.
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.