A fine example is the peppered moth in Europe. When factories began to leave soot on trees and buildings while the lighter ones were picked off by predators the mutated darker moths were naturally selected to dominate the species. They were better camoufloged against the soot and were able to live longer and pass on their genes. This was a scientific observable, documented fact. Science has no role in the philosophical questions it may raise, that is for poets and artist.
Science is a series of planned, controlled observations.
Nothing more, it is a great tool to understand what we are capable of comprehending, not what we wish to comprehend. The scientific process is just that a process, not a philosophy, myth or religeon. You can teach evolution without going into depth about the first man, therefor you dont have to give equal time to creationism. If philosophical questions don't belong in the teaching of science, neither does creationism. Evolution is commonly acknowledged to be a theory, with many questions which remain unanswered, as conceded by some of the world's foremost evolutionary proponents.