An assessment was made in 1978 of the longterm effects on school media utilization of Project Discovery (1964-1967), which was designed to test the effect of "maximum availability" of instructional materials on curriculum, on student attitudes, achievement, creativity, and motivation, and on teaching methods and techniques. The project also tested a demonstration model for disseminating information about creative and innovative ways to use instructional media as National Defense Education Act (NDEA) programs began to have an impact on the nation's schools. For this study, the data of the original project were reexamined and visits were made to four of the original sites in Ohio, California, Washington, D.C., and Texas. Observation and interviews with 21 teachers and administrators revealed that Project Discovery had had and continued to have a variety of effects across a broad spectrum of learning issues. Most respondents were convinced that the use of media materials has a positive and lasting impact on teaching, learning, and the school community. Given current priorities, the cost of establishing large, building-level collections similar to Project Discovery was beyond the financial reach of most school districts. Nevertheless, such programs had paid off in increased utilization of media, improved instructional patterns, and satisfactory completion of curriculum and instructional goals. This report includes a number of excerpts from the unstructured interviews and an 18-item reference list. (Author/LMM)