Design of Classes I

The use of functional programming languages in the first course at many universities is well-established and effective. Invariably, however, students must progress to study object-oriented programming. This article presents how steps this transition have been successfully implemented Seton Hall University. developed methodology builds on students' experience with type-based design acquired their previous introduction courses. made smooth by explicitly showing that lessons they internalized are relevant allows for new abstractions offered be more easily taught used students. Empirical evidence collected from suggests approach effective smooth.