If your site is configured for it, you can restart (take again) the following types of assignments:
Typically, you can complete a course only once. However, your site may allow for a course to be completed multiple times, which gives you more chances to earn a higher score or satisfy specific qualifications for the course. Your learner transcript reflects the highest scores for all course completions, so you will see multiple records for a course you have completed multiple times.
When you launch an asset you've already completed within its open window timeframe, and it has been marked as recurring, you receive the following prompt:
See Recurring Assets for more information.