Get to know and use the students' names and make sure that the students know each other's names. Try to hold the discussion in a good room for example, one with chairs around a table. You might vary where you sit from time to time. When students ask questions, try to get them to find answers for themselves. If arguments develop, resolve the disputes by appealing to objective evidence and not authority of position.
Disputes can often form the basis for later assignments.
Keep the atmosphere as relaxed as possible. Let the students be spontaneous and excited about learning. Your goal is to help all students in a group learn. Usually, a questioning strategy is necessary for a discussion session. Questions can be classified by the thinking process required in order for students to perform.