Step 2: Locate the quiz activity on the course home page and click the quiz's link .
When there are already recorded attempts, the Attempt link will show the number of record, click it to see the list of attempts.
Step 3: On the results attempts record's page, scroll down to check attempts with Require Grading.
You may click on the 'Review Attempt' link or the links for Not Yet Graded and Require Grading.