Instead of saying "you're doing it wrong," show her some video of her favorite pitcher and say "Let's get you pitching like her" (then just use all the IR info you find here). If she doesn't have a single favorite, show her some of the best and say "Let's get you pitching like them."
Yes, yes, yes. Great idea.
Cat Osterman
Keliana Ricketts
Rachel Garcia
She wants to throw almost every day.
You have is a kid with some talent who likes to practice. She can go a long way.