dear sir :
i am very glad that you are my teacher,you are one of the best teachers who i know .there are many good points what we should learn from you,such as kindness,patience,humor and so on.please forgive me that i had made so many mistakes which make you always angry.i really want to be a good student.thanks for you teaching ,i have learn so many interesting things ,so many words,so many sentencesform you,ican feel that it is not only a progress of learning,but also a convarcation of feeling . you are my teacher and good friend, we are the lucky dogs that we have such teacher as you.finally,i hope you happy everyday! best wishes your student。
good luck!
Yours sincerely,
Jane