mossity,
Wassup man. Might I just say I wish I was 16 when I found this site, good for you.
What do you like about this girl?
You might be forcing conversation or trying too hard to have
something to say.
Ask her about her hobbies and interests, for a start. The idea is to not just be some other dude in class, you gotta cross that boundary.
Don't be afraid to be yourself.
Getting to know her and why she prefers certain things is a great place to begin.
I would read these articles by Chase. There's great material in how to talk to people and women.
How To Talk To Girls
The Conversationalist
Keep it real
Hueman