I almost didn't graduate high school for skiing. Last year, senior year, was the first ski season I had my own car. So obviously this meant I could go whenever I want, which eventually led to afterschool. Then it became almost too easy to just leave at noon (we had school till 3) and ski for an extra 2 hours of daylight. My grades blew, after the winter was over I had to work semi-hard to get them up to passing.
Now I only have school three days a week from 9-1, I'm hoping that'll be good enough to keep me from cutting class, even though I know I will.