This document reports findings of a study that evaluated the implementation model developed for Project SHAL, an "effective schools" reform model. Implemented in 1980 in Area I of the St. Louis Public School District (Missouri), Project SHAL is an acronym for the four original participating schools--Stowe, Hempstead, Arlington, and Laclede. The project has two goals: (1) to help students achieve and maintain national academic norms, and (2) to develop a model that tracks program implementation. This paper describes the replication model field test, which sought to assess the original replication model's accuracy and to assess the levels of implementation of the five key effective-schools factors (administration, basic skills, climate, continuous assessment, and expectations). Data were derived from observations of the 19 participating schools, analysis of student scores on standardized achievement tests, and faculty surveys. Findings indicate that the replication model provides an accurate and useful implementation guide. Schools that demonstrated the greatest gain in student test scores were characterized by: (1) thorough project implementation; (2) longer participation; and (3) staff who had become "believers." Finally, successful implementation was a function of time. A total of 15 tables and 5 figures are included. Appendices contain an implementation assessment guide, 19 narrative summaries, the original SHAL replication model, the pilot test, and statistical data. (LMI)