Groups are frequently used in courses, but there is substantial evidence that insufficient attention is paid to creating conditions for successful teamwork. One key condition is high-quality, individual, and team-level feedback. An online peer assessment system and team improvement process was developed for this test case based on three design criteria: efficient administration of the assessment, promotion of quality feedback, and fostering effective team processes. Sample data from 13 teams were collected to propose a means of testing the system against these criteria.