A "real" teacher not only instructs, but also learns
(irrespective of the source of the knowledge), and would never scorn the lesson. I have learnt more from my students, as well as the Saloon's "irregular" teachers, than I ever could/did in my Degree classes!
Remember.....If you send a donkey to Oxford, all you will get back is an educated Ass!!
I agree Amonk - a 'real' teacher never stops being a student.