I found the information on questioning very helpful.
A good questioning technique is to call on individual students rather than calling on the student who raises his or her hand or shouts out the answer first. If you let students shout out the answers or call on only those who raise their hands it won’t be long before only a few students are answering questions. The other students quickly learn that they can disengage since they will not be called upon. Students with learning disabilities have learned to become invisible in classes because they seldom are able to process and answer questions quickly enough to raise their hand. Knowing that any student can be called upon helps to keep the entire class engaged in the discussion.