I watch a ton of HS basketball. AAU basketball and practices, and many training sessions. I can tell you flat out that today's kids only work on dribbling and their handle. That is all fine and dandy until they shoot. Most kids shooting fundamentals are terrible. I dont train but I go up to kids that train with daughter and tell them flat out they need to change their shot. I've discussed iit with her trainers as she has multiple. My daughter out shoots all the boys that are her age and older. Shooting is so simple it should be the best thing you got in your bag. Get your elbow up pointed at the rim and shoot from your elbow out. You take thousands of shots and then your brain tells you how far to shoot. The only thing you have to worry about is getting the elbow up, pointed to the rim shoot elbow out and follow thru.
Virtually none of these boys have any kind of fundamentals and have been shooting that way since 2nd & 3rdcgrade and no one will step in to change shot. Most of them the elbow is tucked close to body and pointed to left 90 degrees away from hoop. They have to contort their wrists to make up for the gross misplacement of their elbow. Shots are long, short. Left and right. The job of the trainer is ball handling which is what they want. Most parents should send their kids to someone who teaches shooting only. RHJ shoots the same way. When he is on his elbow pointed to the ring but his elbow drifts way out as well that is holding him back from 85% FT'er