This article presents a rubric for evaluating student performance on written case assignments that require qualitative analysis. This rubric is designed for three purposes. First, it informs students of the criteria on which their work will be evaluated. Second, it provides instructors with a reliable instrument for accurately measuring and grading student performance on written case assignments. Third, if the rubric is used multiple times during the semester, student progress can also be measured. In addition, we piloted an instrument, with statistically confirmed reliability, for measuring students' perceptions of the benefits of the rubric.