An evaluation was made of the Effective Schools Program (ESP) conducted by the Mid-Continent Regional Educational Laboratory (McREL) for the 1984-85 academic year. The ESP is a research-based program designed to foster self-sustained improvement efforts at the school building level, through systematic long term staff development including carefully planned training sessions designed to develop building level leadership teams consisting of teachers and administrators. The program is based on recent research related to effective schooling practices, educational leadership, organizational change, staff development, curriculum, and assessment. This report of the program evaluation consists of four sections containing: (1) a description of the ESP and a review of the research upon which the program is based; (2) a description of the evaluation design; (3) data results; and (4) a summary discussion. Among the results of the program evaluation was the major finding that ESP did have the hypothesized effects for all stages and levels of the program. More detail is given regarding effects on student achievement, building policies and practices, classroom behavior, student behavior, and participant knowledge of the school effectiveness literature. Seven appendixes, comprising over half the document, consist of various study instruments and data collection forms, including numerous charts and figures. A nine-page bibliography is also provided. (CB)