Creationism has a place in education, but only in the study of religion and culture. Science classes need to focus on tested theories and hypotheses instead of religious beliefs. There is no place for creationism in the hard sciences and trying to put it in the curriculum undermines the purpose of these classes.
Since the basis of science is that hypotheses and theories are subject to experimentation and refutation based on evidence, creationism cannot be taught as true science. Creationism cannot be proven by an experiment; rather, it is an untestable idea or philosophy rather than true science. It should be taught that it is a belief system based on untestable axioms, rather than a scientific theory.
Creationism is a religious belief. There is no basis in science that this even happened. Granted, no scientist knows definitively for sure how Earth was created, the evidence toward The Big Bang Theory and evolution exists. Creationism should only be taught in science classes as a contrasting belief to the evidence of science.
Besides the fact that there is not sufficient scientific evidence to support a belief in creationism, it is not only inappropriate but a violation of the constitution to teach it as it is a religious based belief. The constitution strictly forbids the integration of church and state. So teaching a creation theory based on the belief in a higher being should not be allowed.