http://libertarianteacher.com/blog.html
Do football coaches let just anyone who shows up during those early days actually PLAY in the regular season games?
Of course not.
Assuming that winning is the ultimate goal, they quickly weed out the players who don’t belong and cut them from the team. Only the best - the most talented players - deserve to play when it really counts.
No one in their right mind would criticize a coach for creating a homogeneous team entirely made up of top-notch athletes rather than a heterogeneous football team comprised of a mixture of poor, medium and great players.
Yet educators are vilified when they even suggest something similar.
If we can all agree that winning is the ultimate goal in football, we should be able to comprehend that academic excellence is the ultimate goal in education. For students of higher intelligence and ability, heterogeneous grouping stands as impediments to attaining that goal.