Hello,
After the quiz I changed the correct answer on one question and regraded the students' grades. The grades changed on that quiz but the grade on gradebook is still unchanged. I would appreciate your help.
Thank you John, Yes I regraded the quiz but the gradebook is still showing the previous grade. I am not sure how to remove the override in single view. Would you please help me with that?
Sure - follow the steps on this page to get to the singleview for your assignment: https://docs.moodle.org/310/en/Single_view
Then uncheck the box under the "override" column for the student(s) in question