This report evaluates the effectiveness of the Attendance Improvement Dropout Prevention (AIDP) program during the 1987-88 school year, which provided services to New York City (New York) middle school students at risk of becoming truant or dropping out of school. Chapter 1, "Introduction," contains the following sections: (1) "Background"; (2) "Performance Objectives"; (3) "Evaluation Objectives"; (4) "Evaluation Procedures"; and (5) "Organization of the Report." Chapter 2, "Summary of Citywide Program," contains the following sections: (1) "Program Participants"; (2) "Program Implementation"; (3) "Citywide Program Outcomes"; (4) "Changes in AIDP Student Attendance from 1986-87 to 1987-88"; (5) "Changes in AIDP Students' Academic Achievement from 1986-87 to 1987-88"; (6)"Relationship Between Outcomes and Student Variables"; and (7) "Relationship Between Program Variables and Attendance." Chapter 3, "Individual Programs in School Context," contains the following sections: (1) "Literature Review"; (2) "Student Outcomes in Sample Schools"; (3) "Demographics of Sample Schools"; and (4) "Program Variation Among Schools." Chapter 4, "Outcome Predictors and Implications for Program Success," contains the following sections: (1) "Analysis Methods"; (2) "Variables Related to Attendance Outcomes"; (3) "Variables Related to Achievement Outcomes"; (4) "Negative Factors"; and (5) "Implications for Successful AIDP Programs." Chapter 5 contains conclusions about the program's effectiveness. Chapter 6 contains recommendations on how to improve the program. Twenty-five tables are included, and a list of 20 references. A description of the Effective School Battery and a summary of significant correlations are appended. (JS)