The amosphere in the class room that we create can enhance or hender our student's learning.  When student's feel comfortable to ask questions or feel free to share comments that add to the topic that we are learning we all gain something. An instructor needs to be prepared and very knowledgeable about his/her subject in order to present the material and answer any question with complete ease. This builds report with students and helps gain their confidence in you as their instructor.

One thing that I have found that happens when I move around the classroom as I teach that some students that might not ask questions in front of the class will ask me when I come near them. I feel this gives them an opportunity that they may not have taken otherwise.