Leonard: Guys, please don't make this a school project where I'm the smartest kid doing all the work while the slackers sit back and watch.
Sheldon: We're not. This time you're the smart kid doing all the work while the even smarter kids sit back and watch.
Howard: So, you think I'm one of the smarter kids?
Sheldon: No, you're a tool I was using to make my point.