Historically, it has been impractical to break up the roles of the teacher. You need a certain scale even to have a separate person assigned as a librarian or an audio-visual coordinator. You need a much greater scale, not to mention much better coordination, to have separate people assigned as lecturers, coaches, theorizers and evaluators. Yet relatively few of these roles need to be performed in person, and most of them scale pretty well. This means that with improved information and communications technologies we can begin to rethink how we’ve organized labor in education.
This is in fact what is happening online, at least, outside the circles of formal education. People are finding coaching where they need it, community where they want it, and lectures and demonstrations for those days when they have the time.
Learning Change 