A selected group of 18 school library media supervisors from Washington, Oregon, Alaska, and Hawaii met in an institute to systematically identify the essential competencies for their role and to interact with a group of nine instructors of library media education in colleges and universities. The institute program was conducted in three stages, with responsibility by the participants for the development and redesign of prototypes during the two interim periods. Once trained in the use of the Instructional Development Institute (IDI) system, participants sought to produce a competency-based program and guide to the preparation and certification of library media supervisors, and to develop a variety of competency-based inservice/preservice prototypes. Supervisory participants identified and defined five major roles for a media supervisory. A list of competencies was outlined for each role and for 28 functions, and suggestions were made for preparatory experiences. An "inside-outside" evaluation of the institute was conducted through personal interviews and a written questionnaire at the final session. Abstracts of the participants' inservice/preservice prototypes and the competencies lists are appended. (Author/SL)