Possibly, but its hard to see a ROI in this situation considering they are paying for training and giving the kids a full-time job, possibly with benefits. That's a couple thousand a person in training + 44,000 salary + a couple thousand in benefits and possibly a union membership. I don't see how there is cost offset over converting engineers who have a base knowledge. Not only that, where are they going to go if they lose their job?
We're also talking about high school students here. They've had stuff taken care of for them all their life (baring extenuating circumstances). Not exactly the most responsible bunch I would guess.