This study explores the effect of teaching methods on the academic performance of students in accounting courses. The study was carried out over two semesters at a well-known university in Turkey in principles of financial accounting and managerial accounting courses. Students enrolled in the courses were assigned to treatment and control groups. Treatment group students solved assigned problems or cases in groups in class, while in the control group the instructor lectured on and solved the problems and cases. The results of the study show that there was no significant difference in the academic performance of the treatment and control group students in either course.