ABSTRACT
Teacher professionalism is an important determinant in the pursuit of educational excellence. This study examines how the four factors: academic qualifications, professional training, teaching experience and professional development, affect teacher professionalism. A total of 338 high school teachers from 11 schools in Singapore participated in the study. Interestingly, academic qualifications and teaching experience of the subjects were not interrelated with teacher professionalism, while the variable professional development was an important contributory factor to teacher professionalism. Additionally, subjects with higher professional training had a significantly higher degree of teacher professionalism. The implications of these research findings to the professional development of teachers and their career paths are discussed.