Well were he a wizard and not an alien he would have to do everything the hard way like everything else. I would put him in a good aligned position, probably Gryffindor and lead a helpful and heroic (or try to role). Why the same answer as harry practically? Check out his upbringing. Clark Kent was loved and raised well by his parents. He could end up actually being a hero without being "a chosen one protagonist" like Harry due to his inherent self confidence and decency due to his adopted parentage. If nothing else he'd make a great report for the Prophet. As for returning to teach, I'd saying a Flying or Quiditch coach or the obvious Defense Against the Dark Arts post. Of course I'm still betting on a Prophet role, remember Harry's doing the fighting here along with the order so who better to report it. And yes I'm bored too.