How can I learn more about the grading options? (Also see the video) How do I give one or more students an extension or change a grade? How can I reset a student's grade and allow the student to do the assignment again? I don't charge a penalty for using hints, but my students are charged a wrong-answer penalty. Why? My student says that they did work in an assignment, but Mastering "lost" it. Is this possible? How can I check the student's work?