BECAUSE THE LAST DECADE HAS BEEN A PERIOD OF MORE INTENSE EDUCATIONAL INNOVATION THAN ANY PREVIOUS PERIOD IN HISTORY, A NATIONAL STUDY WAS MADE TO DETERMINE HOW SECONDARY SCHOOLS HAVE CHANGED. A QUESTIONNAIRE WAS DISTRIBUTED TO 10,266 REGIONALLY ACCREDITED HIGH SCHOOLS IN THE UNITED STATES, AND 7,400 RESPONSES WERE RECEIVED. THE SAMPLE POPULATION INCLUDED 85.5 PERCENT PUBLIC, 4.2 PERCENT PAROCHIAL, 6.5 PERCENT PRIVATE RELIGIOUS, 2.8 PERCENT PRIVATE NONRELIGIOUS, AND 0.7 PERCENT GOVERNMENT AND OTHER SCHOOLS. THE RESULTS OF THE STUDY ARE PRESENTED AS TABLES CATALOGING THE MAJOR INNOVATIONS BY PERCENTAGE OF SCHOOLS WHICH ADOPTED THE INNOVATIONS, STATE, ENROLLMENT, EXPENDITURE, TYPE OF SUPPORT, AND AREA SERVED. BRIEF ATTENTION IS GIVEN TO THE ABANDONMENT OF INNOVATIONS, AND INTERPRETATION OF THE DATA IS PROVIDED. THE AREAS FOUND TO BE OF MOST SERIOUS CONCERN IN INNOVATION--(1) ATTITUDES TOWARD LEARNING, (2) STAFF DEPLOYMENT, (3) FOCUS ON THE INDIVIDUAL, AND (4) MEANS OF MAKING LEARNING INTERESTING AND AUTHENTIC--ARE DISCUSSED. SOME ATTENTION IS GIVEN TO THE SPEED WITH WHICH INNOVATIONS ARE DIFFUSED AND TO THE ROLE OF ADMINISTRATORS AS AGENTS OF CHANGE. (TT)