One player with the ball, facing the backboard. On the command the player rebounds the ball off the backboard and then passes to player 2 before running to the three point line. Once they get there they stop, pivot to face the basket, do a v-cut to the near side and accelerate towards the basket to receive a pass from Player 2. The player that passes the ball goes in for the rebound.
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.