Realistically, you may not have the time nor feel it is useful to be this thorough. Often the graduate student instructor has records of only the students' exam scores.
Many instructors simplify things and base midterm grades solely on the students' exam performance.
This method makes sense if you consider that homework and labs have a small impact on the final grade, and often classes are more difficult during the second half of the semester. It is actually beneficial to warn those students who are doing poorly on exams so they have time to improve their grade. After completing the reports, instructors are required to inform their students of the basis on which the midterm grades were determined. Final Grades Near the end of the semester any graduate student who is the primary instructor of a class will receive final grade report forms in their mailbox. These should reflect all adds, drops and registration changes made throughout the semster by your students.