Do professors in the department keep secret grade books?
Some do and some don’t. But even if a professor keeps a private entry of grades for papers, exams, oral reports, participation, and so forth, it functions more like a memory aid than an official record. Since your final grade will be determined by your performance over the course of the semester – taking into account factors like effort and improvement – the professor’s written comments on papers probably provide a more accurate index of how you are doing. Also you can always schedule an appointment with your professors to discuss your progress in a course.