This drill informs players what to do when they have passed the ball. After a player has passed the ball they must cut and weeve. In doing so it gets players into space. After a player has passed and cut through the opposition another player on the offensive team must replace. Again this creates space between the attacker and the defender.
Good team defence is five players guarding the ball, not five separate one-on-ones. The shell drill is where that starts, so here is how to teach help-side positioning and rotations from the first week of the season.
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.