We're going to go through this step by step. "doesn't look at you on lunch and smiles you at class"- mate, I don't know where you have lunch but I'm guessing it's a rather big area in which she has things to do with her girlfriends right? Whereas in class it's a much smaller environment in which there are lots of places to look and people's gazes to meet.
I'm pretty sure you were looking at her first, she caught your gaze, and then gave you a smile. Which doesn't indicate any behaviour out of the ordinary."talks to you even if she knows that you like her"- well she's obviously comfortable with the idea that you have some sort of feelings for her (if she actually knows that is). The bottom line is, I'm not able to tell you what signals she's giving you because I haven't seen either of you interact and I wasn't there, but from what you've given me I can only guess that these are perfectly normal reactions for a nice girl to show a nice guy.
I suggest if you want to make a move you should since you have feelings for her, but don't read too much into things mate!
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.