This seems to be coming up all the time and I have been wondering how it differs from student centred learning. I happened upon Nick Rate's blog where he looks at various viewpoints on this concept including Brian Annan's presentation (Which I recently heard at the Leadership Symposium at Botany Downs Secondary School run by out Cognition team)
Nick sum's it up as "enabling, empowering, self-monitoring, goals, feedback, meta-cognition, active, responsive, self-directed and meaningful." pedagogy.
See his blog post on this here.