Oh, there's no agreement twixt you and me, pete, don't you worry. The peppered moth story is indeed one of natural selection in action, but a simplistic equation of observations over a short period in a limited geographical area with evolution is a little controversial to say the least. There are issues as to whether most moths actually do rest on tree bark, whether death of lichens due to air pollution makes any difference to the ability of light moths to be camouflaged on, for example, birch bark, how relevant the alleged observations of bird predation really are... There's good science in the story all right, but nothing is that simple however much we'd like it to be. The fact that teachers have selected a dodgy and incomplete example to illustrate evolution in action in no way means that evolution does not occur. It does, and it's a fact. Even in peppered moths. Sorry, old chap.