I hope it works out well for you and your son. One of my boys is interested in military school, and we're not going to dismiss the possibility of his going to one, just because we've always homeschooled.
Sadly, our public schools are so incredibly bad that we could never seriously consider them as a viable option. I think that we had semi-decided to move Jr into a more traditional private setting in 7th grade. But, we like this school, and they begin in 6th grade... we didn't want him to enter next year as the "new kid."
Maximum class size (and they only have one class for each grade) is 15. Jr had to take a standardized test for entry, and he'd never taken one before. I've never been worried about his being smart, but I was worried whether he would understand "Water is to lake as tree is to _____."
No worries. Passed with flying colors.