The idea of this is to get the player to perform the correct footwork for the lay up without having to worry about the dribble.
One player stands to the side, holding the ball out for the player to take. (for the right hand side)
The shooter runs towards the ball, as they take the ball, they should beginning their first step with their right foot, they then take the second step onto their left and shoot as per lay up technique.
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.