A study was done of the degree to which a program of comprehensive training in shared decision-making was implemented in Chicago (Illinois) Public Schools. Focus was on reliably measuring the implementation of shared decision-making processes and principles and identifying factors that might promote the adoption of this model at the local level. Study data were obtained through observations of local school planning meetings and interviews with some key school personnel. Observation data were gathered by four evaluators with backgrounds in the implementation of shared decision-making who used an observational instrument relating to role adoption, collaborative planning, consensus building, broad-based ownership, and the integrity with which processes were implemented. The data cover a random sample of 10 schools from the 42 schools involved in the project. Results indicate that shared decision-making and school-based management were successfully implemented in most of the schools participating in the study. Increasing improvement in implementation was noted from Year 1 to Year 2 of the project. The data suggest that training in shared decision-making was effective, and that among the schools participating, two were "model" schools. Included are five tables and an appendix summarizing the implementation of shared decision-making by schools. (JB)