This study attempts to evaluate the effects of special training for collegial supervision under the conditions of two types of organization development (OD) training within the multiunit school. The first type of OD intervention involved training for all the staff members of a multiunit school. The second was called group development (GD) and involved providing only the leadership group with the skills of OD. Different schools received different treatments. The primary purpose of this study was to determine the effects of training in collegial supervision in conjunction with consultation in OD and GD on a number of aspects of school life that included teacher satisfaction with working conditions and with colleagues, professional sharing, and communication adequacy. In addition, student attitudes toward specific subjects and classes were also analyzed. The research methodology is explained, including the hypotheses tested, the instruments used, and the method of analysis. The results of the study are summarized. (Author/MLF)