Instructional product verification and revision: 20 questions and 200 speculations Sivasailam Thiagarajan Articles Pages: 133 - 141
Change in education and the future role of the educational communications consultant Stephen T. Kerr Articles Pages: 153 - 164
Problems and needed directions in the profession of educational technology Kenneth H. Silber Articles Pages: 174 - 185
Research and the practitioner at the regional education service agency Albert L. GoldbergGeorge H. Grimes Articles Pages: 186 - 192