I agree with all of that.

What I was getting to WRT to the GP's post about how charter schools kick out under performing students in order to "prove" that the public school system is inferior.

I'm trying to determine how he distinguishes between kids that are kicked out to make the school look better and kids that are kicked out because they are disruptive.

I already know how to do that (cameras, etc), I'm just wondering why he doesn't consider that school that kicks kids out might be kicking out disruptive kids.