When I complained to the publishers of the textbook my kids were being preached to out of (take that, grammar police!) I was informed, well, that's what Virginia wants; we have textbooks that don't preach in our history line but they aren't bought by your schools. I was unable to interest the ACLU in taking on the publishers, and now my twins are out of high school and majeurs so am no longer in charge of their educations.

And there is really no aspect of science that doesn't have a bearing on evolution since evolution underlies the life sciences, it isn't a separate discipline. Take some biology, chemistry, physics, and you can understand evolution. There isn't such a thing as teaching "evolution" but rather such a thing as teaching science, life sciences in particular.