As you would expect from Bob Garmston, one of the fathers of Cognitive Coaching, this is full of wisdom. It is always hard to actually act upon 'good advice', as Oscar Wilde said, the only thing to do with it is 'pass it on'. However, there are clear action points for thinking about how successful group interactions work, and how best to intervene. Everything he says is also true of classroom discussions and indeed conferences with students. A life time of wisdom on a small topic.