having been to a military school where all the teachers are ex something or other I recon this is a really bad idea.
Having been to a school run by sandal wearing (quite literally), Hilman Imp driving tweed jacket toting lefties, and hence having left with feck all qualifications and spending years of my own time and money catching up, I think it's a superb idea.
Especially if they're taught the difference between dyslexia an insolence.
Ovlov raises an interesting point - ex forces tend to no one of two ways. Some rebel totally against the routine and the bullpois as become right scruffy gits, though re bulk are generally quite disciplined with everything from tidiness to timekeeping, and are generally pretty good at doing what they're told instead of answering back or complaining to their union because they're being made to work.
Another interesting point of my own - a technical degree is usually obsolete within 5 years unless you remain in research, auch as post doctoral etc, so someone my age with a degree two decades old is probably no better equipped than someone of similar intelligence without such a parchment, yet the former would still be the preference when it comes to becoming a teacher.