> If worst comes to worst, a private school can expel a kid who is causing problems. Even deeper bingo. In the first order, it's absurd how much better you ca

> If worst comes to worst, a private school can expel a kid who is causing problems. Even deeper bingo. In the first order, it's absurd how much better you can make your performance at a task look if you get to not count the times you dropped the hard cases. For a second-order effect, the students who cause problems degrade the educational effectiveness of the entire classroom, so eliminating them improves performance for the rest of the students. Unfortunately (for public schools re. their comparisons to private schools), our society demands that a cursory attempt be made to provide educational opportunities for _all_ of the children.