I would say, there is nothing to censor, ID is bunk and proven so. Would you call it censoring if a teacher chose to teach geocentric theory as an "aleternative" to heliocentric?
In the science classes that I took, earlier models of the universe were presented with the current accepted model. When we learned about the atom, we were taught the other models that are not accpeted allong with the one that is accepted.
When I took a class on human evolution, in the beginning the teacher announced that she acknowedges that some people don't believe in evolution and some believe in creation, but this class is not about determining which is right, and creation will be assumed to not exist for the purpose of the class. And it was never mentioned again, no problem.
My point is that you can teach ID in a science class along with evolution, just like they did with the universe/atom models. Why ID and not some other mythical creation story?, because there aren't a bunch of people trying to get those stories into the classroom. Just let it be mentioned, I don't think its a big deal. Or you could also just say, when you get to that part of the class, that ID is total crap and we aren't gonna talk about it.