Does your tennis program develop players?
The key to a good developmental program are the changes, the drills, the competencies, and the obstacles to overcome any completion of the program with a certificate and reward for having accomplished completing a level. Just imagine karate, karate has belts; white belt, yellow belt, blue belt, green belt, black belt, the belts shows the child the developmental steps necessary to reach the next level. Does your program have steps and are they clear to see.