There is so much more evidence that evolution is how things came to be than that God just put it all there. We know that earth has been in existence for millions (billions?) of years, that humans haven't always existed here, and that living things do, in fact, evolve. Just because we don't know every step of the way from a single-celled organism to our current state doesn't mean we can't say that certain things had a certain likelihood of happening. The reason intelligent design shouldn't be taught in schools is because it simply is not science. Evolution, however, is. When you take an honest look at both, you can't spin it any other way.