I honestly don't think it belongs in a science class, simply because it doesn't have any bearing on anything else students will learn. I believe that God created everything, although the process used is unimportant. Honestly, the Bible doesn't say how it was done, just that God spoke and it happened. That doesn't establish anything except for God being responsible for everything getting here. Essentially, that's all the Bible has to say about it. You're not gonna get a lot of scientifically relevant content outta that. Now, it might be worthwhile to mention creationism in parallel with the biographical information on Darwin and the history of origin theories that are found in most science curricula, but you can't toss out all information that might presumably support Darwinism, as there's some hard science in there.
I don't think it's possible to remove all speculation of a philosophical nature from the science books. Honestly, things we assume are scientific fact are disproven rather frequently. Science can only explain what normally happens in the physical world, which separates it entirely from the sphere of influence with which people's religious beliefs concern themselves.
