I am writing this letter to thank you for your kind help in my study and daily life over the past three years. When I had great difficulty with math last term, you always stayed after class to explain the problems patiently until I understood them. Besides teaching, you also gave me warm advice on how to manage stress and make new friends when I felt lonely at school. Thanks to your encouragement, I have become much more confident and I am fully ready for the coming high school entrance exam. I will always remember your kindness, and I wish you good health and happiness every day.