Many courses touch material that is sensitive or contested. You can make those discussions productive by preparing the ground. Set ground rules for discussion early: focus on ideas and evidence, let people finish, and disagree with the argument rather than the person. Remind students of these rules before a charged conversation, not in the middle of one.

When the material may be difficult for some students, a brief, matter-of-fact note about what is coming lets people prepare, and treating it as a normal teaching courtesy keeps it from becoming a flashpoint. Keep the discussion anchored to the academic question. Your role is to keep the conversation rigorous and civil, not to win it or to police opinions.