The nice thing about school is that there is always something there to talk about. There’s the school itself, the classes, other people in the class, the teacher, the cafeteria, yada yada yada. So just pick a topic and ask him a question about it. Guys love to share their opinions about stuff to a willing listener.
Next step, eye contact. If you just keep your eyes on his eyes while he’s responding to your question and he’s at all attracted to you, he’ll be hooked. Just the act of maintaining eye contact for longer than a few seconds has a huge amplifying effect on attraction.
Hold eye contact with someone for a minute and it’s like you talked for an hour. That’s the real key to getting someone to be attracted to you.