In high school I never really skipped because my friends would always go to "hookie" parties and I wasn't about that life back then. I would lie to my Mom sometimes and say I was sick so I wouldn't have to go school.
I can't tell you how many times I've skipped classes in college. There was one class that was only once a week and I probably only attended half the classes during the semester and still ended up with a B. My three-day-a-week classes I would probably skip at least once a week. I'd just follow the syllabus and hand everything in on time. On top of that, the classes I did attend, I would usually be stoned out of my mind. I'm not really sure how I managed to graduate with a 3.0.