The role of the instructor in the computer-based training (CBT) environment has typically not been researched. Yet, recent studies have shown that the behavior and the attitude of the instructor can affect achievement in CBT. Moreover, the importance of the instructor in traditional instruction (TI) settings has been well documented. This paper summarizes the important functions served by the effective TI instructor and discusses how these functions can be provided in CBT. The paper concludes with recommendations on how to structure the CBT environment to ensure that achievement is maximized. (Contains 34 references.) (Author)