As a followup to a 1969 study, called Project CASE, a survey was initiated to determine to what extent computers are used in secondary public schools, and to discern to what extent computers affect the quality of education. Some 5,580 randomly selected schools were questioned about their use of computers; commercial computer manufacturers were queried about the availability of computer technology suitable for use in the secondary schools; the specific exemplary programs using computers were identified. For the period 1970-75, some major findings were: (1) the use of computers is expanding; (2) schools tend to use computers for both instruction and administration; (3) computer-assisted instruction is being used more but it continues to be employed predominantly in the instruction of computer science and mathematics; (4) with regard to administration, the computer is most frequently used for student accounting and resource management; and (5) BASIC has become the predominant language. The characteristics of schools using computers, the levels of their spending, and the sources of their funding are discussed. (EMH)