I have often described the 'Downes Theory of Education' (which is not original to me, and which is too simple to be called a theory) as follows: "To teach is to model and demonstrate; to learn is to practice and reflect." So much writing focuses on the first pair of activities; the bulk of educational literature is focused on how to teach. My focus has generally been about how to learn, but even here I have tended to focus more on practice and less on reflection. But reflection should not be overlooked; 10,000 hours of practice may produce expertise, but 10,000 hours of unreflective practice produces nothing but sore shoulders. Harold Jarche begins this important conversation. I think it's necessary to expand on the idea. A lot.