The "first thing" to be subject to evolution was the first living thing which was able to (i) reproduce itself (ii) without each copy being perfectly identical to the original.
The Theory of Evolution does not address where that "first thing" came from (just as, say, the theory of gravity doesn't address where matter came from). But Darwin wrote, in the last paragraph of On the Origin of Species, that it was "breathed by the Creator." Which, incidentally, is what I believe-- God is who created us, evolution is how.
Since the theory calls for the first item being "breathed by the Creator", does this open the doors for at least some teaching in our schools about creationism?