I only have one hour of actual lectures a week. The rest are seminars in which the attendance is compulsory. For every seminar I miss, even if I email with a reason, I lose 2% (or that is their threat anyway, I don't know how true it is, and don't particularly want to find out!) for that module. I've missed one class so far this term, because I had a hospital appointment at home, and couldn't be in both places. I'm going to miss one on Tuesday too, because he rescheduled another class and moved it to then and I can't make it, but he said he won't penalize because of the situation. But yeah... I only have 9 hours a week... so I don't really see the point in missing them!