The document discusses the differences between the roles of instructors in traditional classrooms versus online classrooms. In traditional classrooms, the instructor takes a teacher-centered role by lecturing and pacing lessons, while online instructors take a more student-centered role by facilitating activities and discussions. It then outlines seven principles of good teaching practice for online instructors, such as encouraging contact between students and faculty and giving prompt feedback, and how technologies can help implement these principles through tools like discussion boards and collaborative activities.