I'm so sick of high school?

It's an endless repetition of so much trivial information i just feel like i can't take it anymore. I'm not one of those kids that comes stoned everyday, i'm smart, i get good grades, i just have stopped caring about what i'm learning. I still try because that's what everyone expects of me, but i hate these expectations. I also am captain of the hockey team, which is yet another activity that i drag myself to everyday. I hate it, and i'm only in my junior year. What can i do? I've started to rethink my entire future. I used to want to go to some ivy league school, but now i say, what's the point? Who f****** cares what college i go to? All i want to do in life is teach or build schools or something in africa.