When you ask a question insist on students answering. If you do not allow enough time or are always answering your own questions students will learn that if they wait long enough, they will not have to participate in the discussions. This can cause them to start falling asleep. If after a short waiting period no one has stepped up to answer your question, call on someone by name. This helps in at least two ways. It forces you to learn the names of the students if you have not yet done so or helps them to realize that you know who they are personally. It will also involve them in class dialogues.
