Three players (1 defender and 2 attackers). Player 1 runs towards the defender before making an S-Cut and receiving the ball from Player 3. Player 1 then turns and shoots before colecting the rebound and throwing it to player 5.
Player 3 then goes into be the defender, with players 4 and five as the attackers.
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.