"To a teacher of an applied mathematics subject this makes heart-warming reading. If only all students could share the insights of this student! Perhaps that would be expecting too much. Nevertheless, it is both reassuring and inspiring to know that many students can and do experience the excitement, confidence and satisfaction that come with that kind of understanding”. This paper outlines the development of the course unit ACST201 over the period 1999-2001. The development was an attempt to implement several basic teaching principles within that unit. The reflection quoted above is regarded as one small indicator of the success of the development.