in most cases turn her over to qualified coaches at 12 yo. Even IF you are a very qualified coach yourself, teenage kids will just plain butt heads with their own parents just to test boundaries and limits of authority. This leads to problems frequently. It is often difficult to coach your own kid thru teen yrs, mom and dad are the last person they want to listen too, about anything. If you have a competitive child, one that competes with Dad, to outdo him, or show him hes wrong , you can forget it, they will never listen to him.