I had mixed results like that years ago, it was 'repaired' later on by repeating the stuff you should already know, mostly as a verification, but the people that might not have read what they were supposed to read would have a chance to catch up.

Ultimately, it is of course the responsibility of the student to decide what they want to do. If you don't want to learn, see learning as a side-job, or live in an environment that does not leave room for learning outside of college hours, then you might be in more generic trouble anyway ;-)