The purpose of this study was to examine how grading leniency and grade discrepancy (the difference between expected grades and deserved grades) were associated with various dimensions of student ratings of instruction. A sample of 754 undergraduate college students completed a student ratings of instruction instrument and provided responses to a number of other questions on topics such as course difficulty and workload. A series of multilevel regression analyses were conducted and results showed that an instructor's grading leniency, as perceived by students, was positively associated with student ratings on 11 of 12 dimensions of instruction examined. This finding suggests that more lenient instructors tend to receive higher student ratings. The second finding shows that grade discrepancy was negatively associated with most dimensions of instruction. This supports the self-serving bias hypothesis under attribution theory (Gigliotti & Buchtel, 1990) in that students tended to punish instructors with lower ratings when expected grades were lower than students believed they deserved, yet little evidence of a pattern of rewards existed in student ratings when students expected grades higher than they deserved.