This study is a longitudinal examination of a process model of psychological burnout proposed by Cherniss [1; Professional Burnout in Human Service Organizations (1980)]. In this model, work setting characteristics and individual difference variables have both direct effects on burnout and indirect effects on burnout through levels of experienced stress. Data were collected at two points in time separated by one year using questionnaires. Respondents were 362 school-based educators. Considerable support for the Cherniss model was found using path analysis.