Bend your knees, at a comfortable angle somewhere around 45 degrees.
Now if you're feet are aligned properly, the rest of your body should follow suit.
Hold the ball in your hand, palm facing up. Your non-shooting hand can dangle to the side.
Slowly bring the ball in and hold is as if you were shooting with one hand.
Your arm should form a 90 degree angle.
Your tricep should be parallel with the floor and directly above your right leg.
Your wrist should be bent with fingers spread out. The ball should be sitting on your finger pads, NOT your finger tips.
Your index finger should be in the center of the ball.
Pause. This is when you make sure your arm, feet, and everything is in the correct form.
Look at the front of the rim.
Proceed to shoot with one hand, leaving your off hand to the side. The player should use his legs on every shot. At the end of the shot, the player should be up on his toes. This is very important, because players generate most of their strength from their legs to shoot the ball to the basket.
Hold your follow through. Tell your players, "It's like reaching into a cookie jar."
Grab the ball and repeat the process.
Get the ball quickly but don't hurry your shot! Take your time.
Each player should get a minimum of 20 repetitions, but 50 or 100 would be better.