Stand with your legs spread apart and hold the ball with both hands in front of you. Bounce it in between your legs, and then catch the ball behind you. Now bounce it back to the front. Do this as quickly as you can. Be careful that you don't hurt yourself with this drill!
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.
The ball screen produces almost half of all professional offensive possessions, yet most teams still teach it as a memorised play. The modern approach trains the read - giving players a framework to decide based on what the defence does, not what the coach called.