Former students of mine might recall that we used to read selections from John Berger’s Ways of Seeing in class.  I can’t remember a time when we made it very far into the text.  The discussions would grow so animated that we’d read a few pages and then lose the lesson in endless spirals of debate.  Certainly, not the model lesson, but good fun all the same.  Anyway, the movie preceded the book. (and that is a sentence that English teachers do not get to say very often.) Take a look at the four part series which aired on the BBC in 1972.