This study analyzes and compares the classroom behaviors of the science and non-science instructors of Widya Mandala Catholic University. Descriptive method of research was used in this study. Forty-five teachers from five faculties and 1353 students enrolled under these teachers participated in this study. A survey questionnaire of 30 items describing the seven areas of competence and characteristics desired of an effective instructor was used to gather data. The study revealed that the instructors tend to be more liberal in grading themselves than what their corresponding conservative students did. Among the seven areas of competence and characteristics cited, the instructors are less competent in evaluation and follow up, classroom management, and teaching methods and strategies and more competent in professional traits and knowledge of subject matter. Moreover, teachers claimed that types of discipline taught, sex, ethnic origins and years of teaching experience are poor predictors of classroom behavior. On the other hand, students claimed that ethnic origins, years of teaching experience are good predictors of classroom behavior sex and types of discipline taught are poor predictors of classroom behavior
