This is a simple drill, but a very effective way to focus on basketball shooting form. It's quick, so it won't take up much practice time, and players are able to focus on the basic fundamentals of proper shooting technique. It adds in, as well, some practice in other areas of the game - passing and rebounding, for example.
It's a good drill to run at the beginning of the pre-season, when players are trying to get their shooting form to flow consistently; a better drill to run once the season is underway and your players have had several months of instruction and practice - at this point, they can run the drill and the coaches can wander from player to player and adjust the shooting form as necessary.
And since it is uncomplicated, without defense or patterns to worry about, it is an especially good drill to run when you are trying to iron out problems with your players' shooting techniques.
Thid drill uses a Toss Back. If you have never used one before, it might be something for you to consider trying. Toss-backs add a different dimension to drills, save on manpower (use them instead of having a player stand in one spot for the drill simply to pass back to another player), and besides allowing players to practice shooting form, they also help focus passing - creating better accuracy in all players.
However, if you don't have a toss-back, simply have a player stand in that position to receive the pass and pass it back.
Toss Back Shooting Drill
The best part of the Toss Back Drill is that it is simple, with few distractions for your shooters. It is also something that you can run on the sidelines if you have another hoop available while you run scrimmage or other drills that don't involve all players - with the Toss Back, players can perform this drill alone.
Remind players to remain focused on their basketball shooting form, as you walk about and adjust shots as you see the need. If necessary, have them slow down and exaggerate the movements to get the rhythm and flow right, before speeding it up again.
Focus on fundamentals.