Both players will face each other 10 feet apart. They will roll the ball back and forth controlling the basketball with only 1 hand.
The basketball should be rolled in a straight line and controlled with the hand the ball was rolled to.
As players improve you can get them to continue this drill while moving from one side of the court to the other (as shown in the video).
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.