This text records the dramatic new prospects for computers in instruction in school, the workplace and high technology research facilities. If offers teachers and trainers a vision of how their professions will be fundamentally altered by these new systems and how their roles will be changed. The challenges and opportunities exposed by these developments in intelligent instruction by computer are many. Topics discussed include: apprenticeship and training in the workplace; automated tutoring in interactive environment; two approaches to simulation composition for training; and transfer, adaption, and use of intelligent tutoring technology.