The coach will put targets on the wall (either with tape of a piece of card) at different heights along the wall for the full length of the court. In front of every target is a cone that is a different distance away from the wall.
For every target the player hits they get a certain number of points.
Keep track of the points and give a prize or praise to the winner.
Just because the players are aiming for something that isn't a basket, we are still focused on correct form.
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.