Scientific theories must make testable predictions, must be falsifiable, and must be open to revision and rejection. As such, the theory of evolution is an excellent and presently the only explanation for an enormous array of observational evidence. That is not to say that it has all the answers to questions concerning life and its history. However, creation stories and Christian creationism are none of these things and do not belong in a science class. There is a time and place for everything.
Nature is what it is regardless of belief, and it is the goal of science to understand how it works.
But this does not mean that such ideas should be taught as or alongside science. History demonstrates that when we ignore nature's laws, usually out of ignorance or arrogance, we do so at our own peril.