Cally,
What do you mean by trade schools? Do you mean trades like welding, building trades, etc.? I agree that many of the skills-based careers might need more traditional hands on classroom instruction, but we are also likely to see a hybrid model develop even there. What about covering all of the technical information in building or welding online and then just conducting "labs" every week or couple of weeks to apply and refine those specific skills in a production environment with supervision?
Herbert Brown III