Dear Miss Wang
I would like to say"Thank you" most at he moment. I can never pay you back for you kindness and your patience. I used to be lazy to learn English and too shy to speak English English in front of the class. You found my problem and helped me out. With your help I made great progress and became the top student in our class. It was you who gave me a hand when I was in difficulties.
Yours
Li Ping