In 1969, the author proposed that a teaching team should consist of a horizontally differentiated staff with team members trained in four distinct skill areas: 1) instructional design, 2) instructional interaction, 3) interpersonal design, and 4) interpersonal interaction. The present paper proposes, in addition, a vertically differentiated staff for the new profession of instructional design. There would be three levels: 1) instructional technicians (teacher level), with teachers trained to use instructional design guides and challenged to design and plan effective instructional environments, utilizing the materials which they have been given; 2) instructional technologists (engineering level), with M.A. level on specialist level technologists trained to develop self-contained instructional systems (multi-media presentations, programmed materials, CAI, etc.) and instructional design guides for use by teachers in preparing their own instructional materials; and 3) instructional psychologists (scientist level), with Ph.D.'s trained to specify and develop instructional theory and to conduct laboratory behavioral science research on principles of instruction. (MBM)