Dear Mr. and Mrs. Smith,

I am writing this letter to offer my sincerest apologies for the trouble I have caused during the recent school event. I understand that my behavior was unacceptable and I deeply regret the inconvenience and embarrassment it may have caused you.

I realize that my actions not only reflected poorly on myself, but also brought negative attention to the school and the event itself. I want to assure you that this is not the kind of person I strive to be, and I am truly sorry for any harm I may have caused.

I take full responsibility for my actions and I am willing to accept any consequences that may result from them. I understand that trust is not easily mended, but I hope that my future behavior and actions will demonstrate my sincerity in making amends.

I have already taken steps to rectify the situation and prevent any similar incidents from occurring in the future. I have spoken with the school authorities and have offered my assistance in any way possible to make things right.

Once again, I am deeply sorry for my behavior and any trouble it may have caused. I hope that you can find it in your hearts to forgive me and give me the opportunity to earn back your trust.

Sincerely,

[Your Name]