If you accept that Learning is a Conversation , and that some of the most powerful learning can take place in the process of conversing and exchanging ideas with others, then setting up ways to have as many of these conversations as possible seems like an obvious thing to do.

If we limit our notion of learning to the "official" channel - the teacher, the textbook, the syllabus - we miss so much. Yes, learning happens at school, but what about outside school? Yes, learning happens in the classroom, but what about outside the classroom? Yes, learning happens in the act of "being taught", but what about when we are not "being taught"?  Our schools system implies that when we ring the bell to signal the start of a class, we are really saying that the learning starts... wait for it... now!   And at the end of the lesson we ring it again to say the learning now stops. Ok, school's over, you can all stop learning now. Until tomorrow.