Players on the left start with a ball each. Going one player at a time they dribble out into the centre of the court where they meet the defender.
The defender should prevent them from moving across the court.
Before they get within arm's reach of the defender the attacking player should drive into the key where they have a shot.
After each turn players join the back of the opposite line and the attacking player retrieves the ball and passes it to the defender who has now joined the back of the attacking line.
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.