Split into groups of 4 and put them at different baskets. They will take 1 shot with correct form get the rebound and then pass it back to the next person in line.
Focus on correct form.
A lot of positive reinforcement to the players. Let them know when they have done a great shot.
We are not focusing on makes and misses, however if you want to here you can put players into different teams and have a shooting competition.
Play first team to 5 baskets.
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.