The writers advise on applying Harkness teaching or the practice of leading student-centered discussions to the history classroom. Drawing on an Exeter Humanities Institute (EHI) program set up by Phillips Exeter Academy in New Hampshire to explore aspects of leading student discussion, they offer guidelines on preparing for discussion, working with unpredictability, establishing discussion habits, observing and evaluating discussion, and fostering student writing and using technology. They also discuss concerns of EHI teacher participants about the transferability of discussion-based teaching to their schools.