Biggs' presage-product-process model provided a theoretical framework for modeling the observed interrelationships among gender, age, self-efficacy, proactive attitude, locus of control, academic experiences, knowledge orientation, learning approach, and self-reported academic ability in a sample of 120 Hong Kong graduate students of education (M.Ed. students). Gender and locus of control were found not to have any significant direct or indirect effects on self-reported academic ability. Selfefficacy, academic experiences, and learning approach had direct positive effects on self-reported academic ability, while the effects of age and proactive attitude on selfreported academic ability were indirect through one or more of the process variables which in turn had either direct or indirect effects on self-reported academic ability. The final path model, minus gender and locus of control, fit the data well, had good predictive power, and suggested that age, self-efficacy and proactive attitude could prove useful for identifying part-time M.Ed. students most likely to succeed in their studies.Key words: presage-process-product model, path analysis, part-time M.Ed. students, academic abilityPart-time students in general and part-time graduate students in particular face unique challenges in successfully completing their studies. They are usually older than their full-time counterparts and are more likely to have job and family commitments competing with the demands made on them by their part-time studies. And, moreover, they are likely to have been away from formal studies for a number of years making the initial adjustment to their role as part-time student difficult.In many ways part-time graduate students of education (M.Ed. students) could be expected to find their return to academic life even more challenging than part-time graduate students in other disciplines. Typically, part-time M.Ed. students are well along in their careers as educators with many being senior teachers and some being department heads or even school principals. Their practical classroom experience and their frontline knowledge of the day-to-day happenings in their schools could be expected to make them question textbook theories of education proffered by university lecturers who are unlikely to have the intimate knowledge of the classroom and the school that they, as practicing teachers, have. This suggests that part-time M.Ed. students might be more practically minded about their studies seeing them as a means for upgrading their qualifications rather than for obtaining deeper understanding, knowledge, or meaning. Some support for such