Replying to I'm growing something in my locker

So as a little side project this year, I was going to bring in a rubbermade bin and put it in my locker. I will then fill it with soil and plant a partially grown tree in there. This way, it will be much harder for me to have a bad day at school, seeing how every time I open my locker, a beautiful tree will greet me.

My question is, what kind of tree is fast, and easy to grow in a confined space? Also, I heard that battery-powered grow lights exist, yet I can't find any. Anybody here with a greenthumb?