Let's see.. In HS, I can't think of any, but now that I find myself in college, having to take some of the same crap I did in high school...
Grrr.
English 101. My teacher told me at the end of the semester that I was in the wrong class, and had wasted my time. Should have been in 106. But I have to take 102 because the advisers at my school don't care about getting you into the right classes, really. I also have to take Intro to Speech Communication 101. Same class I took in high school and passed with an A.
Gotta love Gen Ed.