Tennis training aids
Does anybody have any experience with using tennis training aids to teach juniors or adults? I see that there is the serve doctor to teach beginner's the correct location of the ball during the serve. There is also a tool to teach topspin and another tool to teach the whip like motion of the modern forehand. These tools seem very interesting just wondering if anybody has used them. My daughter is 7 and some of these techniques are very difficult to teach.