I have been working with 13yo DD the last few days on her swing. Swing is improving, although still a little long to suit me. anyway- here is the question. She is just having an awful time hitting the ball off the tee. she consistently swings under the ball. the weird thing is that she is banging heck out of the ball in soft toss, or front toss. sometimes I stand on a bucket & drop balls in front of her for a quick reaction drill & she does reasonably well at this too. What in the heck is the problem hitting a stationary target????