Students in Catholic schools make up a significant sub group of the Australian population. As such, studies of this group provide valuable information about the religious beliefs and practices of some Australian youth. Many students in Catholic schools express traditional religious views and have relatively high levels of religious behaviours. Over time these levels diminish but in a fashion that invites careful analysis and comparison with standard theories of secularisation. An important finding suggests that student responses are indicative of a loosening of religious affiliation rather than a complete disengagement. These results suggest a more nuanced view of students in Catholic school be adopted with implication for the conduct of Catholic schools in secular cultural contexts.