here is a video of my dd pitching from face on she is throwing a curve then some screwballs then from back view working on inside outside hi low fastballs . thanks
YouTube - SANY0673.MP4
YouTube - SANY0673.MP4
Get a new pitching coach. I've seen enough 15, 16 year old's struggle with those pitches to know that a girl that young can't. ALL the experts say that young girls can't throw the pitches. In fact they recommend explicatly against teaching them.
Your daughter has the talent to be a very good pitcher. The fact that she can throw so hard with the mechanichs she has proves that.
Her knee bending is not good. She wants it to be only a slight bend or straight out.
She hops completly to the side when she moves. I'm not as sure on the rules as others would be but you can't just move your body in a hop. It also is holding her back.
She doesn't step straight up the power-line (towards the plate) When she does her stride she wants to be straight towards the plate. Not to the side.
She has no follow through with her foot.
She leans too far foward when ptiching.
Honestly the best advice I can give you is find a new pitching coach. The one she has is clearly terrible and you are wasting your money. Your daughter has some very big mechanichal problems that need to be fixed for her to improve. You mention her pitching 60mph. With that form she won't. She shouldn't even be taught how to do drops, screws and curves, when her form is all over the place. There are coaches out there that 'teach' these pitches so that you think you're getting bang for your buck. You're not.
I'm not trying to rip her apart here, I'm trying to give you some good advice. I'm not that good with how to correct her errors. There will be others who can do that. Good luck with everything!
here is a video of my dd pitching from face on she is throwing a curve then some screwballs then from back view working on inside outside hi low fastballs . thanks
YouTube - SANY0673.MP4