The quizzes and tests are limited to 7 attempts. The fastest way to complete the class is to pay careful attention to the course material before the quiz so you can pass it on the first attempt. If you find you have failed the quizzes/tests too many time, please contact support@diehl1.com to reset it for you.
Also, the course manual is available and because it's a .pdf if it's searchable to quickly look up topics you need to review.
(Use Control F or EDIT FIND).