Student Quiz Re-entry

When a student is taking a quiz, that student's attempt is "in progress" until one of three things happens:

1. The student submits the quiz
2. The availability window for the quiz ends
3. An enforced time limit for the quiz expires (and the instructor has selected the option to auto-submit the attempt)

If a student leaves an attempt in progress, including closing the browser or suffering an network connection interruption, the student can re-enter the quiz and complete it at any time until the availability window for the quiz ends.