“Teaching is a messy, indeterminate, inscrutable, often intimidating and highly uncertain task.” And, teachers deal with realities like these by constructing defenses, defenses that prevent them from confronting teaching. So, observes Richard F. Elmore in the foreword to one of the all time best edited anthologies, Education for Judgment: The Artistry of Discussion Leadership. When faculty ask for a resource on discussion, this is still the book I recommend most often.