Replying to how do you do this?

ok so most of you are guys so say there's a girl in one of our classes and you really don't know her at all but you're pretty sure she digs you cuz she looks at you a lot and you can just tell. i don't know anybody in my class and this is happening with a guy. i really want to talk to him and not let the opportunity slip away!! should i drop(or throw) my pencil under his desk, or do some other thing to strike a convo? any ideas? help? please?
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triple it triple it trip-le-it 1! brrrrrrr cha cha cha cha cha cha cha


ba-dum-ching!