This summary of the 1982-83 School Utilization Study updates and extends the results of a 1976-77 study of school utilization of instructional television and examines changes in instructional television availability and use patterns between 1977 and 1983. The study reported surveyed 619 school superintendents, 1,350 principals, and 2,700 teachers about in-school instructional applications of programming and equipment in the areas of audio/radio, instructional television, computers, and other media. Following an introduction and overall summary of the major findings, the availability of instructional media is considered in more detail. An analysis of instructional media use is drawn primarily from teacher questionnaire responses. Data on support for instructional media are reported, including financial support, support personnel, and district and school policy. Included are 121 data tables and technical appendices containing a summary of the study design and procedures, copies of the 1983 survey instrument, a discussion of the study reliability, supporting tables for reported results, and a list of study advisory committee members. (LMM)