I like the idea of giving examples of what you've learned from your discussions with this teacher.....specifically, what issues she has helped you with, and how you have been able to implement the ideas in your daily life, or how it has made you feel to talk to her about
these issues. Perhaps you could make note of the things you are grateful for in your relationship with her. I think your gesture is wonderful, Taryn....and I'm sure she will treasure this letter for many years to come. Good luck to you.
Living one day at a time.