Are you able to take him on as simply a clean up guy to start? This may give you an idea on how keen he is in regards to the trade. You'll obviously get an idea, by the questions he asks and such.
I've worked with these coop kids before, and judging by their listening skills, you may be better off with someone who will no doubt be paying more attention to what's going on, to make up for his short comings.
If he doesn't show any interest after a few weeks, then you can speak to his teacher, and let'em know that if he's gonna send someone out, they better have a genuine interest in the trade.