<p>You did NOT cheat; you should talk to your teacher, and go to any lengths possible to get that letter off your transcript. Get your parents involved, possibly anyone you know on the school board. Make it too much trouble for your principal to want to deal with. Explain things to your teacher, let her know you didn’t open the attachments, and if she is not sympathetic, she is irrational and forget her. /endrant</p>