I was definitely nervous, in fact I was nervous all the way up untill role was called even tho the teachers agreed, but I knew it had to be done. An example of my email:
Dear Mr./Mrs. _______
The reason for my e-mail is to humbly ask for your cooperation while I am attending your class this fall semester. I will let you know that I have been diagnosed with GID (Gender Identity Disorder), but it is not something I disclose to everyone. As part of my therapy, I have chosen a prefered name, James. My birth name is ______ _____, so that is the name that will show up on my records for now, but James is the name I prefer to go by, as it will soon be legally changed to. Hopefully this e-mail reaches you in time for Monday classes. Thank you for your time and cooperation.
I don't regret telling my teachers, but I can understand the concern about people not accepting it so well, but you never know until you try, maybe it'll end up working out