In most cases, it is best to approach the professor directly. If you aren't comfortable talking with the instructor, or if you have and there was not an acceptable resolution to the problem, then you should talk with someone else in the department—the undergraduate adviser or the department chair. Many students find it easier to discuss their difficulties first with the department adviser, who may have useful suggestions. If the adviser isn't able to help, you can go to the department office and ask for an appointment with the department chair.
Contesting a Grade
First discuss the matter with the instructor before the end of the following academic quarter. If you are unsatisfied with the instructor's explanation, the next step is to submit a written appeal to the chair or dean of the department (within ten days after meeting with the instructor). Send a copy of your appeal to the instructor as well.
Within ten calendar days, the chair or dean will consult with the instructor. Should the chair or dean believe the instructor's conduct to be arbitrary or capricious and the instructor declines to revise the grade, the chair or dean, with the approval of the voting members of his or her faculty, will appoint an appropriate member, or members, of the faculty of that department to evaluate your performance in the course and assign a grade.