Ask a kid to dunk a basketball off of one foot and watch the ground mechanics.
If they can do that, teach them the approach and let instinct take over. Getting them to the board with good speed in controlled manner on a consistent basis will far outweigh teaching anything else.
But what coachformelyknownas states (about track not his indigestion) is right on the ball, teach em how to accelerate, cue posture, teach how to do an approach, cue posture, reference similarities, then go from there . . .
This post was all over the place, read a ranter become a sort of ranter? I hope not.