A study was designed to identify patterns or relationships among test items used to measure teacher stress and develop a measure of teacher stress using a Likert-type scale. The subjects of the study were 89 experienced elementary and secondary school teachers, who rated 50 items related to events in a classroom situation or school setting, using 7 stress levels, from no stress to minimal, mild, moderate, severe, extreme, and catastrophic stress. Responses were correlated and then factor analyzed using a principal components factor analysis and a varimax orthogonal rotation. No items had an average rating of extreme or catastrophic stress. Eleven factors were identified in the principal component factor analysis, one of which related to student cheating and accounted for 59.3 percent of the variance. The major conclusion from the findings was that the primary general factor related to stress was the behavior of students in the classroom. Two other important factors were teachers' relationships in the school and union activities and deviant behavior of students in the school. (FG)