Background and purposeDiabetes self-management education and support (DSMES) equips patients with diabetes with the knowledge needed for appropriate management. The purpose of this study was to compare perceptions of student confidence/aptitude held by students, pharmacy faculty preceptors, and patients regarding student teaching of a DSMES class. Educational activity and settingThe study was a prospective assessment of fourth-year ambulatory care advanced pharmacy practice experience students. Students taught a single DSMES class and evaluated their confidence using a 14-item survey before and after the class. Patients who participated in the class and a pharmacy faculty observer completed the same instrument. Responses were compared using Friedman and Wilcoxon signed-rank tests, as appropriate. FindingsTwenty-six students completed the survey. Overall, students’ self-perceived confidence scores significantly increased for all questions after teaching the DSMES class (P < .001 for all questions). Confidence scores among students and faculty preceptors were similar with no significant differences in perceived confidence. There were some significant differences found among student and patient scores, with patients assessing student’s perceived self-confidence higher than the students on three items (P < .05). SummaryStudent pharmacists’ perceptions of their own confidence and abilities improved from before to after teaching a DSMES class. Student and faculty preceptor confidence scores were similar. There were few differences between student and patient confidence scores, with patients rating students highly on their perceived confidence in teaching a DSMES class. Patient feedback is important to consider when evaluating student confidence and abilities.