@ashley Street's wikipedia entry (http://en.wikipedia.org/wiki/Brian_Street) explains it pretty well; autonomous view of literacy = skills, ideological view = literacies. Schools tend to take the skills view, e.g. writing is invariably (a particular kind of) formal writing. It doesn't take into account the different kinds of meaning making that we do in the real world, depending on context. A good example: teaching and testing letter writing though we are far more likely to write emails in the real world. Worse is when the two are conflated, because they are not recognised as distinct literacies. The multiliteracies and new literacies ppl (e.g. Gee, Jenkins) largely share this sociocultural view. However, I don't think everyone who's jumped on the "literacies" bandwagon is aware of this distinction.