Have players and cones set up as shown in the video. The player with the ball will hold it in the middle of their chest.
Going for 30 seconds the defensive player must keep their head in line with the ball by staying low and using a defensive slide.
The player with the ball can move how they like side to side between the cones.
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.