Advanced Standing Examinations are one way to earn credit for MIT subjects outside of the classroom itself. If you’re confident that you’ve already mastered introductory coursework at MIT, then you can take an ASE to test out of it. It’s essentially like sitting the final before the class begins. If you do well you get to keep your grade on the ASE as your grade in the class; if you do poorly you can simply take the class and the bad grade disappears.
No one will ever hold your education back at MIT, and you will never exhaust our curriculum of hard, interesting classes.