你也没说什么内容啊?怎么写啊!
Dear Teacher:
I want to thank you so much for putting in effort and being patient when it comes to teaching us. I learned a lot ofin your classes. I wish I can be good at (_____fill the blank with subject),. You have worked so hard to help us improve our speaking and writing skills, and I want you to know how much I appreciate it. I will continue to learn better English. I wish I can become a teacher in the future.
your sincerely student