Dave, the problem, IMHO, is that if any of those elements are present, the class is prohibited. In other words, if a class doesn't advocate overthrow of the government, doesn't promote resentment toward others, doesn't advocate racial solidarity but is designed primarily for students from a specific ethnic group, than it is verboten. I don't think anyone would deny that classes in, say, Black history are designed for a specific group, although they are not (and have not been in Arizona) officially restricted to that group.