No, students cannot un-enroll from a class. Teachers can remove a student from a class on the Class Management screen. Students may register for multiple classes. To do this, the student can click on their name in the top-right corner of the screen and click ‘add class’ and type in the class access code.
Should a student be moved or transferred into another class, they should continue to use the login they originally registered with and add a new class access code to their account.