pbee writes:
Why would the big bang theory(unmeasurable by current scientific method) make it's way into school curriculum's whilst creation would not?
Actually there is evidence for a Big Bang such as background radiation and the consequence of mathematical reasoning. However I believe Big Bang theory is taught in schools as a speculative theory arising out of our current scientific understanding. I have not actually looked at any modern textbooks to see the manner it is presented, so I could be wrong.
However, your question as to why not creation - whose creation myth are we going to teach? Biblical, Hopi, Acoma, Navaho, Norse, Egyptian, Babylonian? they are all on equal footing as far as scientific support.