The classroom is a social construct that is designed to facilitate learning. While learning can occur even when the only active participant is the student--as is the case when a person is reading a user manual--the most effective learning scenarios are those that involve the proactive involvement of both instructors and students. The fundamental benefit of a personal student-teacher type of interaction is that the feedback and control mechanism is firmly established and can always be invoked to maintain the learning direction towards pre-set objectives. Moreover, the learning process is essentially affected by peer-group relationships within the classroom environment.