I would imagine by teaching they mean more proselytizing and by doing that they are opening up a can of worms for themselves. Which religion gets to be in charge. I wouldn't object to a class on religion done from a neutral position or even the Bible if the kids read it and discuss it without outside indoctrination but I am sure that is not what is proposed. My daughter became an atheist by reading the Bible and if they just started at Genesis 1, I doubt that they could get through that first book without a whole lot of kids questioning the logic of it and they're having to give it up.