coaches, all the way up and down the ladder fall short in teaching mechanics of the game. They put players into layup lines expecting this to help, when actually teaching the mechanics of the skill is what is needed. Like foulshots, for instance, if not taught properly,,,all personal-time practicing does is make a person very good at doing something mechanically very wrong.
When teaching foulshots you have to look at the shooter from side, back and front
from the side: to look at overall mechanics and arc of the ball in flight...from the front: hand positions throughout the process, elbow, breathing, release,,,from the back: follow through and how the ball enters the hoop....also focal point (there are two): over the front of the rim (if struggling) or targeting the inside half-diamond of the back of the net (if in a good shooting mode).
Do they release the ball and hold their follow long enough or do they drop their follow too quickly. Are they releasing half of the breath on shot transition and exhaling at the point of release? Do they try to shoot a foulshot like their jumpshot?
There is a heckuva lot more than just standing at a line and jacking up reps