This sixth in a series of ten learning modules on coordination of cooperative education is designed to give secondary and postsecondary vocational teacher-coordinators preparation to work with people who are responsible for providing on-the-job instruction for students in a cooperative vocational education program. The terminal objective for the module is to develop the training ability of on-the-job instructors, while serving as a teacher-coordinator in an actual school situation. Introductory sections relate the competencies dealt with here to others in the program and list both the enabling objectives for the four learning experiences and the resources required. Materials in the learning experiences include required reading, self-check quizzes, model answers, case studies to critique, model critiques, and the teacher performance assessment form for use in evaluation of the terminal objective. (The modules on coordination of cooperative education are part of a larger series of 100 performance-based teacher education (PBTE) self-contained learning packages for use in preservice or inservice training of teachers in all occupational areas. Each of the field-tested modules focuses on the development of one or more specific professional competencies identified through research as important to vocational teachers. Materials are designed for use by teachers, either on an individual or group basis, working under the direction of one or more resource persons/instructors.) (JT)