Active participation in classrooms often involves group work. In order to examine the effect of using peer evaluations as part of that experience, this study measured the influence of four formats of peer evaluation on students' perceptions of fairness of the peer evaluation method, its impact on peer engagement, and peer evaluation scores. The privately delivered peer evaluation format, where each student indicated what type of letter of recommendation they would write for each of their peers, was most effective in increasing perceptions of peer engagement and scores. These results suggest that a real-world style peer evaluation is most effective at promoting participation in groups, which should help students to become prepared for activities they will experience in the work world.