The Teacher as an Actor
Jane Cox, Professor in Music and Theatre, notes that we are acting everywhere—[hopefully] in ways that are contextually appropriate. In the classroom, it is not about becoming another character (we still need to be ourselves), but about becoming the best teacher that one can be. She offers several practical techniques to enhance communication and keep students alert and interested. First of all, preparation helps reduce ASMs (annoying speech mannerisms). One should also be prepared for things that may come up unexpectedly during the class.
Instructors should also pay attention to how they use what actors refer to as the instrument: the voice and the body. The voice becomes more interesting with attention to volume (breathing deeply), articulation, and using a variety of pitches. Also, the ways one enters class, moves during class, and gestures are all a part of the communication between teacher and students.
More Teaching Tips and Techniques for Large Classes at Iowa State