[Your letterhead, if desired; if not, your return address]
[Date of letter—month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I am writing to apologize to you, my teacher, as well as to the school staff, for cheating on the recent history class test. Obviously, this was a major lapse in judgment on my part, and I am profoundly regretful for having done this. I know I should have studied and learned the test material more, and I know that cheating is always wrong and is a violation of the school's honor code.
Please let me know when I can take the history test again and whether there is anything else I need to do to make amends for my mistake. Thank you in advance for your time and for considering my apology.
[Sender's first and last names]