This report summarizes the results of a two year investigation into the feasibility of using telecommunications satellites for educational purposes compared with the use of other delivery systems. Different systems emerge as preferable depending upon such circumstances as topography, number, and geographic distribution of participants, and the number of hours to be supplied. The Executive Summary provides an overview and conclusions about the costs of providing Instructional Television (ITV) by satellite as opposed to non-satellite systems; an examination of the results of several special studies including one on the impact of the new copyright legislation; implications of the forthcoming World Allied Radio Conferences; and a variety of non-cost variables. It includes also a brief review of the Educational Satellite Communication Demonstration and a summary of the finding from a series of case studies reviewing different possible patterns of ITV delivery and usage. The remaining two chapters present an indepth cost analysis of delivery system performance, and the findings from a set of case studies examining characteristics of existing systems in various settings. Appendices include cost components, derivation of comparative cost equations and notes on the revised copyright law. (WBC)