Alan is correct about much, and not so about others. Check with your school as far as if it is accredited or not. Delphi actually has a system that most of the colleges I met with thought was fantastic (In that a kid, if he gets I think it's 79% or lower, has to re-study it and get it right, for each subject studied). Most colleges I spoke with said that was almost unheard of.
True..the kids study off of check sheets. The problem isn't that they'll screw off, as "Qual" ensures that won't work. However, what they miss is as Alan said, being taught by specialists. Now having gone to some excellent Private schools, I found zero that helped me, but that doesn't mean there aren't some good ones, somewhere.
What is even worse than that is the almost total lack of discussion that goes on in "Regular" schools. Quite a few Scientologists I knew agreed this was really the worst problem in Scientology schools.
Also, they for the most part, are VERY bad in Math, and Science. Lastly, often they have little or no athletics.
I'd say go to the school and spend a day there. Their hype will convince anyone it's the best school. However, is it really? Go see. I say check out other private schools, or even the local
educational systems: some are quite good, and they're FREE
My best ~