Teach her the "smile and nod"...it is much better than trying to argue with some of the idiots she'll run into. (My DD had an umpire start giving her advice after she struck out 15.)
She just looks at the guy offering the advice with great big eyes and a smile and says, "Do it like this?" She does it once, then goes back to the way she was doing it.
She just looks at the guy offering the advice with great big eyes and a smile and says, "Do it like this?" She does it once, then goes back to the way she was doing it.