I can't offer anything more than has been said in the comments above me, but yeah, find out if this crazy lady has any power to implement those changes and if she does, do something proactive. I liked the idea of calling in the ACLU and/or the Pastafarians as a nuclear option, since that'll stop a lot of this shit in it's tracks and I believe extremism should only be met with more extremism.
Belief is different from thinking. You can change thoughts, you can't change someone's belief because they already follow it without proof......they're nuts. So rational argument is out of the question towards her, but should always be on the table to your principal or school board.
Oh yeah and: Fucking Evangelical Christians, they just can't let things lay. Nooooo, they have to force their views on others because their interpretation of that ancient piece of fiction tells them to spread the word in any way possible. Never mind the fact that Jesus said (through gospels written a couple centuries after he died) that those who openly show their faith, those that wear their religion on their sleeve for the world to see are not worthy of entering heaven, and that your faith and worship should be a private thing between you and god.
It always impresses me how many people who claim to be christians never read the bible, or if they do, never pay attention to the parts that are inconvenient.