Sample of child apology letter to class teacher

Dear {Mrs./Mr. Teacher Last Name},

I am very sorry that I {behavior} in class. I know that this was wrong because {explanation}. I am being punished with {punishment} and I will never {behavior} ever again.

I like your class very much because of {class activity}. It makes me very sad that I made you punish me. I promise to be a better student in the future.

Your student,

{Sender}