Are there anyone from Military Boarding School?

I am trying to find the info about Military Boarding School kids going to Military Service Academy (MSA) but I couldn’t find any. Why is that?
Is that true that Military Boarding School is only for bad behavior kids, not for kids who have Military mindset and want to go to Military Service Academy? Is that a wrong choice to go to Military Boarding School if you want to go to MSA?

I've never been to a military boarding school, but I know that most that I've seen are not reform schools but schools for kids who are interested in the military or the structured environment.