I am a Ph.D. student, and I took a course with my supervisor last semester. Our class consisted of only three people, and our grades have been released. My grade is 91 out of 100 in the Canadian grading system. In my opinion, I performed better than the other students during both the term project and the final exam. I noticed that the class average is 92.3, and it seems that my grade might be the lowest. This is quite disappointing for me. When I inquired about my grade from my supervisor, they said:
Ranking the three students in the class was a challenging task. I had to evaluate their performance comparatively. Your achievement of 91% indicates your exceptional performance in the class. Typically, I reserve scores above 90% for students whose term projects have the potential to be developed into significant research papers. In your case, I made an exception.
could someone explain this paragraph to me? what does he mean by exception? How can I improve my grade, I have two more classes with him and I do not want to score low. We are planning to do reasearch together, and this grading makes me feel disappointed.