Players should throw the ball in the air slightly ahead of themselves for them to step onto.
As they catch the ball they should jump slightly.
As they turn towards in mid-air towards where the basket is they should raise the ball above their head so that when they land they are ready to shoot.
First coach this skill to players individually, getting them to perform the jump shot position without actually shooting.
Once they have understood the movement put players into pairs, with one ball between two and shoot at a basket.
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.