I found this on Tumblr and I wish I could find where it originated, but this is a really good resource for transgender students who want to get in touch with their professors before a class begins to make sure they are called the correct name. Spread this far and wide.

Dear Prof. XXXX,
My name is XXX. I will be taking your XXX course this semester (XXX). I am writing because I have a unique situation that I feel as though you should be aware of. On your roster, my name appears as “XXX.” That is my full and legal name, however, I go by the name XXX. Please do not misunderstand that this is merely a matter of preference. I am a transgender individual, and therefore, being addressed as my proper name and use of (TYPE) pronouns is essential to my academic success at the XXXXX. I would greatly appreciate if you would kindly respect my name and use (TYPE) pronouns, starting with roll call on the first day so that there is less confusion for the other students. Please do not hesitate to e-mail me back if you have any questions or need me to clarify this further. Thank you in advance, and I am truly looking forward to the first day of class.
Respectfully,

XXXXX