I agree with what Beta has said, but I'd also like to add that I understand why people may dislike school.
For me, especially with high school, it was the process. (I'm speaking of US Public high schools, I went to school in Germany for 1-3 grade, but that was on base. Although it was a DODs school, so it was a little different.)
I like how college works itself out. If you pass the tests, you pass the class. Seriously, in high school, only 50% of your grade were the tests. The other 50% was attendance, participation and homework. I actually made a deal with my AP Psych (yes, I hated school, yet I took AP classes) teacher that if I pass all of the tests and do none of the homework he would pass me with a C, and guess what, I passed. (Although not too happy with my grade, but I made my point.)
In college I am responsible for saying "I didn't really understand the lecture, I should probably answer the questions at the end of the section/chapter at home tonight." It's frustrating, and hard work, and it's hard because it's a different kind of work. You're excersing that gray muscle.
Stick with it, 5 of my friends dropped out, and only 3 have their GEDs. Of those 3 only 1 has done something with it and started college last year. (and a car crash later, on account of drunk driving, he is back in town, and going to school again.)
My point is, it's okay to not like what you're doing, but look at the long term, I can't see a reason NOT to go to school.
And for those who don't want to go to college afterwards, well it's awesome.
and a story...
After I graduated high school, I thought I'd take a year off before starting school again. Everybody had told me "go to school, go to school, don't hold it off, don't make excuses." Well I didn't want to take anybody's word for it, so I decided to see for myself.
So I went out and got a job. My first job was $10 which is a pretty decent wage fresh out of high school. The drawback was that it was part-time. A few months later I decided that I should go find a full time job and I turned in my 2 week notice. (bad move, ALWAYS have a job lined up before you quit your current job. Yeah, this is common sense, but I didn't see that for some reason.)
Luckily the CEO (no joke, he worked across the street from me, I was doing warehouse work.) asked me what was going on. I told him that I felt as if I were out growing this job, and that I needed a full-time position. He said that there was a full-time position at another warehouse that he owned, and it was a small pay raise. $12 an hour. Well I'd be stupid to turn that down. So I took it.
Well my luck would have it that 3 months later I was laid off. That's when I realized how much being in the workforce sucks.
I followed through, and went back to school. You may call me stubborn, or thick skulled, because I was, but I'm glad I was laid off. It taught me to appreciate education.
The point of this story isn't "go to school," so much as motivate yourself.