There may be a time when students have completed a quiz/exam and you have discovered a problem with a question in the exam or the exam total points. Possible scenarios might be:
- Decide to throw out a poor question and not count it.
- Discover the answer specified as correct in the quiz is actually wrong. You want to correct the error and regrade the exam.
- Discover that a short-answer question is not automatically grading the answer correctly because some students have used capital letters while others have not.
- Missed changing the value of a question from the Moodle default of 1 pt and you want that question to be worth more points.
- Want the quiz total score to be X points instead of the Y points as it was originally set.
Moodle will allow you to make these types of changes to a quiz question or exam and then run a re-grading of the exam. You will get a warning that the quiz already has attempts, but you can still change the value of the questions or quiz and the correct choice.
Count a Submitted Answer as Correct
Step 1
Select the Quiz you want to grade
Step 2
Click on Attempts
Step 3
Scroll down to the bottom, where you will see a table of points
Step 4
Click the mark you want to update
Step 5
Scroll down and click on Make comment or override points
Step 6
Scroll down to Points
Step 7
Change the Points field to the full point value. 
Step 8
Click on Save
Mark All Answers as Correct
For Multiple Choice questions, you can set all answers to be correct. Students will get credit for any answer they've chosen
NOTE: This only applies to multiple choice questions. True/False and Essay questions cannot be changed this way
Step 1
On the course homepage, click the link for the quiz
Step 2
Go to the Administration block and click Edit Quiz
Step 3
Find the question and click the Gear Icon
Step 4
Set the Grade for all answers to 100%
Step 5
Choose Save
Update the Exam Scores
Step 1
Go to the Quiz Administration block and click Results, then Grades
Step 2
Click Regrade All. The Regrading attempt page appears 
Step 3
Click Continue. Updated scores are sent to the Gradebook
Change the Maximum Score Possible in a Quiz
Step 1
On the course homepage, click the link for the quiz
Step 2
Go to the Quiz Administration block and click Edit Quiz
Step 3
Find the question
Step 4
Change the Graded out of value to zero by clicking the Pencil icon
Step 5
Press Enter
Step 6
To change the exam total score:
Step 7
Go to the Maximum grade
Step 8
Enter the new score
Step 9
Click Save
NOTE: Changing the maximum score of a Quiz can affect overall gradebook totals as well as the grade weight of your quizzes
Change a Question's Answer
Step 1
On the course homepage, click the link for the quiz
Step 2
Go to the Quiz Administration block and click Edit Quiz
Step 3
Find the question and click the Gear icon
Step 4
Change the choice for the correct answer by setting Grade to 0% on the wrong answers and 100% on the correct answer
Step 5
Click Save changes
Step 6
See the previous section Update the Exam Scores
Remove Capitalization Requirement on Short Answer Question
Step 1
On the course homepage, click the link for the quiz
Step 2
Go to the Quiz Administration block and click Edit Quiz
Step 3
Find the question and click the Gear icon
Step 4
Change case sensitivity to No, case is unimportant
Step 5
Click Save changes
Step 6
See the previous section Update the Exam Scores