ElizabethofYork
Old Crone
Yes. Probably. But it's again a question of degree and as you said above, seperating fact from morality issues. The world is not flat and that's scientifically provable. Whether or not homosexuality, sex before marriage, abortion, etc, are right or wrong is a whole different ball game.
I don't think schools have to teach that certain things are right or wrong. They just have to explain the facts, and make the point that some people disapprove.