I put students in the box and have them toss, like an infield throw - as demonstrated above. At this point, I would want her over emphasizing the hips and tilt, and I would try the bat locked behind the back, in her elbows, drill. She has to tilt and knock the ball off the tee with the bat.
Take her out to the field and have her try these drills - and then, work on driving the ball to the fence.
Take her out to the field and have her try these drills - and then, work on driving the ball to the fence.