Well then, it's a good thing we have a Republic that was (at least in theory) specifically fucking designed to avoid the big pitfall of democracy, which is the tyranny of the majority.
Seriously, learn some fucking civics. The US government IS NOT AT ALL supposed to work like you say it does. "Whatever the majority wants, the majority gets" IS NOT how our republic is supposed to work. That's just mob rule, and Plato knew thousands of years ago that it was a bad idea.
In a limited republic like what the US is supposed to be, there are certain rights and privledges that not even the government or "the majority" can ever take away. There are things the government is not allowed to do, no matter how many people think it should be able to do it. One of those things is teach a state religion, which is essentially what teaching "creation science" in the classroom is.
So yes, we DO need to keep religion completely out of education standards. And we DO NOT need to take a vote on this. And even if we did take a vote on this, and even if every single person in the country voted for it, it STILL would be unconstitutional and the government would have no right to implement it.