As students get the idea, you may find yourself intervening less, and discussion becoming a much better use of class time. Stage re-creations or dramas. In some cases this might venture toward a staged debate if they will also need to argue a specific position. In other cases dramatic elements might be emphasized. Conduct a symposium.
Students can put on a symposium around a central concern of the course.
Rachel Fink uses this as the culminating project for her embryology course. They also turn in a paper, which is appropriately different from the oral presentation. Rachel brings her students into the speaking center to get them organized, and they work extensively there to prepare their presentations. Last year she ran the symposium jointly with a course being taught at Smith and reported that our students both learned enormously and were notably impressive. Stage a trial.