Set a chair up at the freethrow elbow extention to the three point line. A ball is set on the chair and a player next to the chair. A player is rebounding as well. Then the shooter starts at the chair and then sprints to the half court line then back to the chair in a low squared up position with his wrist back in shooting mode so he can pick the ball up snatch it back and shoot. Repeat on both sides of the three point line. Continue untill shooter MAKES 10-15 shots. then shooter rotates to rebounder and rebounder to the player who sets the ball up on the chair. Then the chair boy rotates to shooter. Two balls are required one is already on the chair when the shooter begins then the rebounder has one then when the shot is up the rebounder then passes the ball to the chair boy to set the drill back up.
Shooter will learn to be in shooting position squared low center of gravity so when he/she catches then elevate then shoot. Catch n' shoot. Also shooter will learn to have wrist back so when he/she catches they won't have to caulk back to shoot. One fluid motion. Or shooter will already be in a triple-threat position when they catch it.
Instead of a chair you can have a passerto deliver the ball to the shooter. Or on any five spots of the three point line. Top, wings, baseline.
This basketball drill is licensed under a Creative Commons License. This drill is from Pål Degerstrøm at www.degerstrom.com/basketball.