An article from a lesbian middle school teacher in California discusses coming out in school. This teacher decided to let her students have some Q&A time with her about her sexuality, only to be told in advance not "to tell your class about your sex life and show pictures."
That day I spent about a half hour in each class telling my brief story, passing around the pictures, and answering questions. Several kids told me that their church says homosexuality is wrong; I simply acknowledged that I know many churches have that perspective. One of the kids asked a question about lesbian sex--not a disrespectful question, but a question. I said it was a good question for a sex education class, but that it wasn't something I could discuss. Everyone else had relevant and engaged questions or comments: "How does your daughter feel about having lesbian moms?" "How does your mother feel now? Are you still angry at her?" "How did you know you were a lesbian?" "My cousin is gay." "My aunt is a lesbian." "My dad says I'm lucky to have a teacher who will talk with us about so many important things." The next day, I received a letter from the principal, telling me that she was putting a formal complaint in my file. I also received emails from several teachers offering support and encouragement (including two from teachers who told me they were gay but asking me to keep their secret). There were no complaints from parents. I contacted my union representative, who sent a letter to the principal and to my file supporting me.
The school later tried to fire her, but they didn't succeed.