Media Education across the Curriculum

I have said something about media education but what about the idea of media education across the curriculum? First of all some teachers would say "I am a history teacher", "I am a geography teacher", "I am a mathematics teacher" - "I don't need to talk about the media, I have got a subject to teach and I need to get on with it". I am afraid we live in a world where that isn't quite so easily possible now or indeed whether it is even productive or desirable. I am not sure because media don't just represent things like tele-novellas, soap-operas, dramas, the news - the media represents science, they represent geography, they show us the world, they show us its structures, they talk about mathematics - one way or another - and there is no way that we can seriously talk about the world if we are talking about any applied field at all without reference to media representations.