A survey of current lesson development was considered essential to determine the quality and effectiveness of instructional material produced on the PLATO IV computer-assisted instruction system. The trial period lasted for several years. Both civilian and military personnel developed the lessons, in consultation with the Military Training Centers Group at the Computer-Based Education Research Laboratory, University of Illinois, for the Defense Advanced Research Projects Agency. Eight representative lessons were selected by a Chanute staff member. Then an evaluator prepared in-depth reviews of each, both in the formative and summative stages. Data gathered from the individual analyses formed the basis for the final report. It indicated general trends and isolated problem areas in the instructional design. The study resulted in an assessment of the instructional effectiveness and utilization of the pedagogical capabilities of the PLATO system in one training environment. (Author)