I bet it's tough to teach a science when you can't identify its mechanisms...
"If it is true that an influx of doubt and uncertainty actually marks periods of healthy growth in a science, then evolutionary biology is flourishing today as it seldom has flourished in the past. For biologists collectively are less agreed upon the details of evolutionary mechanics than they were a scant decade ago. Superficially, it seems as if we know less about evolution than we did in 1959, the centennial year of Darwin's on the Origin of Species." (Eldredge, Niles [Chairman and Curator of Invertebrates, American Museum of Natural History], "Time Frames: The Rethinking of Darwinian Evolution and the Theory of Punctuated Equilibria," Simon & Schuster: New York NY, 1985, p.14)
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"When discussing organic evolution the only point of agreement seems to be: "It happened." Thereafter, there is little consensus, which at first sight must seem rather odd." (Conway Morris, Simon [palaeontologist, Department of Earth Sciences, Cambridge University, UK], "Evolution: Bringing Molecules into the Fold," Cell, Vol. 100, pp.1-11, January 7, 2000, p.11)
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"Darwin and evolutionism stand astride us, whatever the mutterings of creation scientists. But is the view right? Better, is it adequate? I believe it is not. It is not that Darwin is wrong, but that he got hold of only part of the truth. For Darwin's answer to the sources of the order we see all around us is overwhelmingly an appeal to a single singular force: natural selection. It is this single-force view which I believe to be inadequate, for it fails to notice, fails to stress, fails to incorporate the possibility that simple and complex systems exhibit order spontaneously."
"... "The creationists so animating one another, the lay public, and our contemporary court system today rest uneasy with Darwin's heritage. Natural selection, operating on variations which are random with respect to usefulness, appears a slim force for order in a chaotic world. Yet the creationists' impulse is not merely misplaced religion. Science consists in discovering that point of view under which what did occur is what we have good grounds to expect might have occurred. Our legacy from Darwin, powerful as it is, has fractures as its foundations. We do not understand the sources of order on which natural selection was privileged to work. As long as our deepest theory of living entities is the geneology [sic] of contraptions and as long as biology is the laying bare of the ad hoc, the intellectually honorable motivation to understand partially lying behind the creationist impulse will persist." (Kauffman, Stuart A. [theoretical biologist, Santa Fe Institute, New Mexico, USA], "The Origins of Order: Self-Organization and Selection in Evolution," Oxford University Press: New York NY, 1993)
Cordially,
But they teach evolution anyway, don't they?
Yes. Yet science is full of it. (And you can take that any way you like.) Many scientists are full of themselves. In the end, they are all faith-based, whether they recognize it as a religion or not. Reason (math) & science can only fill in some gaps; it cannot be the be-all, end-all, as much as "godless" people would like to delude themselves. They always require suppositions, propositions, to which there is no end.