The importance of teaching computer ethics is shown by its inclusion as core content in both information systems and computer science model curricula. This paper outlines a method for evaluating undergraduate computer ethics programs using the Defining Issues Test of moral judgment. A “before-and-after with a control group” research design was used. The experimental group exhibited a significantly larger increase in moral judgment development than the control group. This indicates that computer ethics teaching is having a useful effect on students’ ethical development.