Students ask questions and probe each other's answers from different perspectives. This method works well to understand complex issues, e.g., Supreme Court decisions. Students are given roles to help them be productive in the seminar. Some students are speakers, some are listeners. This device allows teachers to give a voice to all students and to let talkative students develop their listening skills.
Roles can rotate within a seminar or from seminar to seminar.
The goal is for students to become proficient in a variety of roles.