This quantitative research aims to analyze discreet and simultaneous effect of school climate, reward system, value orientation toward job satisfaction and organizational commitment. It also analyzes the indirect effect of school climate, reward system and value orientation toward organizational commitment through job satisfaction of public middle school teachers at North Minahasa regency, Indonesia. Data are taken from a survey to 216 teachers from 15 middle schools, and analyzed using regression and path analysis. Findings include 1) direct effects of school climate and reward system toward job satisfaction; 2) direct effects of school climate, reward system and job satisfaction toward organizational commitment; 3) indirect effects of school climate and reward system toward organizational commitment through job satisfaction; and, 4) the direct effects outweigh the indirect effects.