Dipping away.

working away on the dip. Currently, I'm having a deeply exciting time looking at theories and methodologies - right at the moment, Krashen's Natural Approach, TPR and the Silent Way. Why do none of these seem to have much to say about higher level English Learners? They're all focused at getting beginners competent to a certain degree. Since I generally teach the other end of the spectrum, I'd be interested in the work done regarding theories and methodologies for those who already have higher levels of L2.