In the comments to the post below, some points came up that I wanted to respond to, as a way of better situating myself among the various options on the table.
For one thing, I must strenuously disagree with Kirby Olson (Lutheran Surrealism) who writes that
The fact that evolutionists believe that theirs is the only theory that can or should be taught is itself a kind of religious faith that asks to be established.
This remark indicates, I think, a confusion of the distinction between a good theory (or the best theory among various alternatives) and a religious or quasi-religious faith. Evolutionists ask that their theory be the only one taught for a reason: because it's the best theory we presently have. The question I want to raise is this: is that a good enough reason to silence all challenges to it?
In all the discussions I've observed and participated in over this issue, one thing has struck me again and again: that people who disagree with mainstream biology feel oppressed and marginalized. The very rhetoric of "teach the controversy" works because it appeals to a deeply American sense of fair play and championing of the under-dog.
You see, what I want to do is quite difficult: I want to articulate a position that acknowledges the sense of resentment at unfair treatment that is associated with criticisms of evolutionary science, but without granting any scientific validity to those criticisms.
I have no qualms with the view that evolutionary theory, in some sense, is the best theory we presently have. And I certainly don't think that intelligent design theory or creationism have any chops as scientific theories -- at least in the versions that have seen the light of day up till now -- and this is not because they involve claims about supernatural beings, but because they claims they do make are not testable.
My suggestion, rather, is that even if that is the case, they still have a place in science education. At stake here in what I'm saying isn't so much about theology or epistemology -- I can't bring myself to care about theology at all, and I have little patience for all the details of epistemology. Rather I'm slowly working my way towards expressing a sentiment I have about what education is, about why education is important, and about the point of having an educational system in a pluralistic society.