* Manually: A person reads each answer and assigns points based on correctness. This is time-consuming, especially for large classes.
* Answer key and tallying: A pre-made answer key is used, and the grader counts the number of correct answers for each exam. This is faster than completely manual grading but still requires human intervention.
* Scantron/Optical Mark Recognition (OMR): Students fill in bubbles on a special form, which is then run through a machine that reads the marks and scores the exam automatically. This is the most efficient method for large classes.
* Computerized grading systems: Many learning management systems (LMS) like Blackboard, Canvas, or Moodle can automatically grade multiple-choice exams if the questions are inputted into the system. Students usually submit their answers electronically, and the system compares them to the answer key.
The best method depends on the size of the class, the resources available, and the preference of the instructor. For small classes, manual grading might suffice. For large classes, scantrons or computerized grading are far more practical.