Set up as shown in video clip.
When the ball is on that players side of the court they will deny.
When the ball is on the other side of the court, the players will come across and play help defence.
Once the ball has been passed to one of those players then they will play 2v2.
Four players standing still make every ball handler's job harder. Teach V-cuts, L-cuts and back cuts so your team gets open and punishes defenders who overplay.
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.