After a course has finished, you can still access the archived version of the course at your leisure. An archived course's content is generally available indefinitely, but please note that it is not possible to get credit or a Statement of Accomplishment for assignments, quizzes or exams after the course has ended.
To access content after the course has ended, sign in to lagunita.stanford.edu and go to your dashboard. From here, click on the "View Archived Course" button to be taken to the course site.
You can also register for an archived course just like you would register for a live course. Go to the course About page from lagunita.stanford.edu/courses, then click the Register button.