What is the point of complaining to the school or the school board? It is a PUBLIC SCHOOL and will not change. You may get one teacher publicly chastised or fired but the tenor of the school and the content of the instruction will not change. Those who care about their children have already made alternative provisions for the children's education. Those who keep their children in public school have shown that what they want is for the government to keep their kids during the day so the parents don't have to deal with them. They do not actually care about such esoteric concepts as "education" and "morality." Just keep those damned kids out of the way for a few hours.
I used to think that it was just people being unaware of what the public schools were doing to their kids and do the Republic. It has been going on too long now and the information has been too easily known. There is no excuse any more at all.
As we have frequently demonstrated here on FR, offenders who get email from all over the country when they do some boneheaded progressive thing to a defenseless person quickly realize they are not acting in secret — others are watching. Most bullies change their behavior when they see that their victim has many, many allies.