I will give my course as an example, I have no classes in this week but I do have assessments and exams which I come to attend, but only those. If I have no exams for that class I don't turn up eg. 3u math at tafe has an exam on the moday of that week, so I turn up to that but no 3u math classes, however 4u maths does not have an exam, so I turn up for no classes for that despite the lack of exams. This happens in several tafe faculties I believe but not neccesarily all faculties. So in summary, in non-teaching week, you have just assessments and turn up just for those, no classes.