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You can unenroll from an edX course at any time. View instructions at https://support.edx.org/hc/en-us/articles/115015783627-How-do-I-unenroll-from-a-course-edX's instructions on unenrolling from a course.

There are absolutely no academic penalties associated with incomplete edX studies. You can enroll again for the same course (if it is still offered) at a later time.

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