- 88 - 4.63 Occupational Experience in Industrial Education. Teacher trainers shall possess at least three years of practical work experience as wage earners in a trade or industrial pursuit. 4.7 Duties of Industrial Supervisory Trainers. Industrial supervisory trainers shall provide instruction for industrial supervisors and foremen in such courses as human relations, fundamentals of supervision, job instruction training, effective communication, effective speaking, and conference leadership training. 4.8 Qualifications of Industrial Supervisory Trainers. Industrial supervisory trainers shall have at least six years of successful work experience in industry or its equivalent, two of which shall have been at the supervisory level. In addition, they shall possess at least the minimum requirements for a teacher in the general field of work in which the conferences are to be held. These persons must have demonstrated ability to lead conferences, and they must have an adequate understanding of human relations. 5.0 PLAN FOR COORDINATING STUDIES, INVESTIGATIONS, RESEARCH, AND THE PREPARATION AND DISTRIBUTION OF PROFESSIONAL AND TECHNICAL MATERIAL FOR EMPLOYED TEACHERS. Research may be conducted by the teacher-training institutions designated in 4. 3 of this Section, by county boards of public instruction through the local director of vocational education, and by the State Board for Vocational Education through the State Department of Educa- tion, when the research is confined to one of the following areas of study: Identifying and determining industrial training needs Methods of instruction Supervision of instruction Instructional facilities and materials Industrial employment and occupations Placement and follow-up of trainees Standards for the organization and administration of industrial education programs Measuring effectiveness of instruction Selection and training of teachers Methods of coordinating training with industrial needs Any other studies that might have direct bearing on the expansion and improvement of industrial education. Professional and technical materials will be prepared and distributed upon request to employed teachers by the Educational Materials Laboratory, Division of Vocational and Adult Education.