Have you been a teacher? I've often been in the position of explaining things to children from points of view that I don't necessarily share. It's called being objective and acting with integrity. You have to put both sides in every case. All the teachers I've ever encountered (except for some teachers of religion) have known that the classroom is not the place to proselytise. Hidden in your post is the old reds-under-the-beds scare. It's not justified. Your only alternative is to keep people ignorant, and that's the right-wing position.