Players line up outside the key in two lines, with one ball per line.
The first player to run must shoot as soon as they enter the key.
If they score their team get 2 points, if they miss but catch the rebound before it hits the floor and then score their team gets 1 point. If they miss altogether their team gets no points.
The winning team is the one which gets to 21 points first.
Look to see that all your players are thinking about their shooting technique as they make their shots.
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.