A study assessed the teaching/learning environment of one professional development school in a variety of ways that included a combination of quantitative and qualitative measures. Results were analyzed using the eight scales of the "School Level Environment Questionnaire" (SLEQ) as categories: Student Support, Affiliation, Professional Interest, Staff Freedom, Participatory Decision Making, Innovation, Resource Adequacy, and Work Pressure. In addition, the following five features of organizational culture served as lenses through which to view emerging themes and patterns: shared values, rites and rituals, social standards, organizational politics, and cultural networks. Results indicate that the school's professional staff perceived significant differences between their actual and preferred teaching/learning environments, as measured by the eight scales of the SLEQ. These differences are attributable to concerns staff members had regarding organizational dimensions such as unclear communication, lack of adherence to the school's stated mission and vision, changing expectations, and dissonance they perceived as originating at the leadership level. (Contains 42 references and 9 tables.) (Author/DFR)