When students complain about points on an assignment, either you or your course assistant (i.e., Teaching Assistant, Instructional Assistant, or Learning Assistant) should gather information from the student (via course email or a face-to-face meeting) to ascertain the nature of the discrepancy. In such cases, the best tools to have on hand are the grading rubric for the assignment and the completed rubric for the individual student.
Rubrics express expectations for assignments and specify performance levels (i.e., increasing levels of understanding and competence) with a range of points to be assigned. If a student expresses that they “should have gotten more points,” turn the conversation into a learning conversation with, “Where in your assignment have you shown the levels of understanding and competence that would warrant more points for your work?”
You may find that there was an error in grading, and you can change the points. In such cases, be sure to consider whether it is right and fair to make such changes across the board, if other students were inadvertently marked incorrectly. Alternatively, you may find that there was no error in grading. In these cases, a conversation about what you expect and what the rubric means can be helpful to the student.
If the student’s complaint is about the final grade in the course, the student would need to follow the University’s formal procedures. See the University Faculty Senate’s procedure G-10: Grade Mediation and Adjudication for details.