Thanks again for all the input. I took all the posts and made up a list of points I wanted to cover. I really felt that preparation was the key. During the lesson, I covered all the fundamentals and was able to see where she was going wrong. I was then able to create a shot or two that highlighted the problem for her so she could see it. Then I explained what she needed to do to correct it. She then spent some time practicing that, and I could see her improving before my very eyes, and her smile getting bigger and bigger as she started making shots. She kept playing and playing well after I thought she'd stop, kept getting more and more balls out as she was getting better. As important as that, we had fun too so the night was definitely a success!
She's playing an APA match tonight (she's not on my team) so I'll go down and support her. She's only ever won once in two seasons. It would be really rewarding to see her do well.
What would be the next step? Wait a month or so and see how she progresses? Or set some targets/goals?
Also Bob, thanks for your post. I didn't see it until I got back from the lesson, but I will download your PDF and study it. Many thanks.