This report examines the 1988-1989 Attendance Improvement Dropout Prevention (AIDP) program as it operated in 30 New York City public high schools under new guidelines and broadened student eligibility criteria. Part I introduces the dropout prevention program, lists program guidelines and objectives, and describes the evaluation methodology. Part II focuses on program implementation, noting that all participating schools implemented attendance incentives and parent outreach, individual and group counseling, and P.M. schools; and that 70 to 80% implemented 9th and 10th grade houses, block programming, part-time jobs, work-study, vocational training, and independent study. Part III presents student outcomes and part IV gives conclusions and recommendations. A review of the data revealed that all five of the identified program objectives were met in more than 50% of participating schools: (1) 63% of schools met the average daily attendance objective in 9th grades and 53% met that objective in 10th grades; (2) 94% met semester attendance objective in 9th grades and 100% met that objective in 10th grades; (3) 50% reduced their percentage of long-term absentees in 9th grades and 63% met this objective in 10th grades; (4) the 9th graders in 23% of the schools and 10th graders in 97% of schools met the credit accumulation objective; and (5) 67% of schools reduced their dropout rates by the requisite amount. A list of variables used to measure each objective and a list of participating AIDP schools are appended. (NB)