I went through elementary school (1-8) in a class of nearly 60 kids, taught by one Sister of Mercy. (who had absolutely no mercy whatsoever). But in those days, most kids came from two parent households who civilized their children. The parents expected their children to be disciplined in school when and if the child misbehaved, and if the parent found out, the kid got it again at home. The critical point in education is that children need to be civilized by parents and taught the basics of the fact that there is a difference between good and evil because good and evil exists, stop denying it exists, and then demand that educators continue to imbue that reality.
Money, class size, fancy buildings, and myriads of teacher aids have generally no influence upon education. Most surveys that say otherwise are nothing more than educational elitist studies that serve to prop up the destruction of the educational system and keep those elitists in control. Mainly because those who do the studies mostly try and make the facts fit the foregone conclusion along with refusing to admit what is really wrong with the educational system; the teaching of moral equivalency, that the breakdown of the family unit doesn't matter, that pop culture is valid, centralizing the education system away from local control, and fallacy that every child must go to college.