The refinement process of a survey instrument developed to operationalize the construct of organizational climate by identifying and describing the dimensions of middle-level school climate is described in this paper. Seven dimensions of organizational climate were identified: administrative support, administrative control, teacher intimacy, teacher frustration, faculty expectancy and motivation, pupil control behavior, and tangible environment. Second-order factor analysis was used to examine the relationships among them. A total of 1,749 teachers in 88 out of 235 middle schools, a 39.6 percent response rate, completed the instrument. The refinement process added three new dimensions--faculty expectancy and motivation, pupil control behavior, and tangible environment. A conclusion is that the instrument is a reliable and valid scale for operationalizing the construct of organizational climate in middle school settings. Thirteen tables are included. Appendices contain the initial and final forms of the survey. (26 references) (LMI)