If you have taught much at all, and especially if you have invited students to dialogue with you or each other during the lesson, you most likely have discovered that certain people like to dominate the discussion. What you may have overlooked, however, is your own potential to be overbearing. Sometimes we want to avoid certain people from hijacking the conversation. Sometimes, we are intent on making a certain point. Sometimes, we just want everyone else to listen to us. The end effect, though, is a stifled discussion and lack of reflective thought.
There will be certain points that you need to press home to the students. There will be those who will take over the conversation if you are not careful. This requires extra preparation. Who can you plan to call on to give an extra voice, so one or a few don't take over? How can you teach that essential point by asking questions, rather than just giving the answer?