Instructors can view a log of all events that occurred, with timestamps, during a student's quiz attempt. 

1. Go to Toolbox > Quizzes.
2. Click the More Actions arrow to the right of the quiz name.
3. Click Grade.
4. Locate the student and click Attempt 1, or whatever attempt you want to view if you allowed multiple attempts. 
5. Click View Event Log, which is located near the top of the page.