Thanks and btw-absolutely agree he should go to the school board, although it is fairly likely they will not allow comments from the parents. The school boards screen the little cards they tell folks to fill out pre-public session, and then do not give the person their 3 minutes, telling them "sorry, no time, please reschedule" - month after month after month. I have observed that in person time and time again, watching that type thing occur over and over if it is a topic the school board is unwilling to talk about, or have go public.
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This is the post I responded to btw:

"Need reliable evidence that they talked about gay oral sex in your daughter's class. Your word is not to be trusted."