Possible bug with university classes?

Depending upon which class it is your sim also has to either take a final exam (which requires add'l study time to pass) or submit a term paper (which needs to be revised until the quality is good enough to be turned in) or make a presentation using the presentation board (which also requires refining to bring up the quality). If she didn't do one of these she'll fail. When you look at the thing that tells you what time your classes are (the work/school tab of that thing in the corner that shows your needs and relationships and skills and all that - I don't remember what it's called) it'll tell you whether your sim is supposed to do the test or the term paper or the presentation.