We contacted all parties, but, unfortunately, the Green Party candidate was very hard to reach, and he responded last with regrets. The other three will be there a couple weeks from now, and they want a list of questions before the day. Some want the list immediately. That's not unreasonable, and I'll provide them (most of them), yet it would be nice to see them responding on their feet.
I'll be soliciting questions from my grade 10 class tomorrow, but I thought I'd put this up here in case my wise readers have some juicy ones worth asking! The debate will be for an audience of 15-year-olds, so the issues can't be too complex or we'll lose the audience - and nobody wants 150 bored teenagers in a room.
ETA - The challenge is, as it is every day for teachers, how to provoke as much depth of thought possible within the constraints of one-hour of time and a wide variety of levels of understanding in the room.