Dear Ms/Mr. Yang
I do feel sorry about what I did yesterday. Now I really know that I shouldn't do that kind of thing. I admit that I didn't focus on the things you told, what's more, I didn't behave well at that time.So I want to show you my apology and I promise that I wouldn't do that again while I will study hard and be serious about my study.
Sincerely,
Your student,xxx
July, 29th, 2013
Dear Young Teacher:
I'm sorry, I should not have done yesterday, I really did not how a good school, once again tell you I'm sorry. I will definitely learn the future, no longer be sloppy, I promise.
Your students: xxx
July 29, 2013