What should schools do?

Here is some advice from BloombergView: http://www.bloombergview.com/articles/2015-11-03/disruptive-students-hurt-high-achievers-most.

Here Thomas Sowell argues that people often draw the wrong conclusion when someone points out that one reason students in charter schools perform well academically is that charter schools exclude and expel disruptive students: http://www.realclearpolitics.com/articles/2015/11/03/ignoring_the_obvious_128623.html. Critics of the schools argue that the charter schools should not exclude and expel disruptive students. Sowell argues that the correct conclusion is that public schools should exclude and expel disruptive students.