[byecomputer]

I enjoyed high school and college -- found them to be fun more than anything -- and I still have "I screwed up/didn't attend a whole class/have a crazy test in school" dreams.

I think it has more to do with school being the first place you have those pseudo-professional experiences of "Ahhhh! I blew it! I didn't work hard enough!" So your brain is like, "I think I have this one in the archive somewhere."

[schoen]

Yeah, I find the stress/bad memory theory unsatisfying -- high school was one of the happiest times of my life and I rarely found it stressful, but I still have not-infrequent nightmares of being back in (my or another) high school and having skipped classes or not knowing where to find classrooms or whatever. These dreams are generally not similar to any actual events I experienced in high school.