I'm going to inject some selfish, self-indignation here to spice up the argument a bit.
I really do not care how we got here. I do not need to know how the entire human race came to be. It does not matter to me if we were created by some all-powerful, all-knowing being, if we evolved over time or if we were crapped out of a giant potato. Knowing such would not change my life one bit, nor would it reaffirm any of my own beliefs.
What I do care about, however, is where I came from and where I am going. I am more interested in living my life day-to-day and planning my own future than finding out where humans come from. They arrived on Earth long before I got here and they'll die out long after I do. I'm just along for the ride. If evolution's correct, we'll evolve and move on like we have the last hundred thousand years. I won't be around to see it. If ID is correct, God will eventually smite everyone for whatever reason. I won't be around to see that, either.
If we find out where we came from before I die, then great. If not, it ain't going to bother me at all.
But that's me.
Evolution is a scientific theory. It should be taught in science classes. ID is a religious theory. It should be taught in bible study. They're both theories and should be treated as such. Niether of them are right, and neither are wrong. They're theories, regardless of if they're based on fact or preconcieved notions about an angry, invisible being in the sky. Saying either of them is fact is foolish.
Of course, I don't believe the bible should be used as a scientific...anything. But, that's my own opinion.