This fellow got a public service award from Harvard, his alma mater, and this is how he talks at that citadel of progressivism:

Extended school days and mandatory summer classes are required if the achievement gap is going to close, said [Geoffrey Canada]. Teachers need to be paid top salaries, and the ones who don’t perform need to be shown the door, he said, of the crop of “lousy” teachers who too often populate schools in urban and poor areas. In addition, school administrators and officials must be held accountable. [italics added]

In the audience was Robert Coles, famed psychiatrist and author, after whom the award and accompanying “Call of Service” lecture is named.

Canada here:

How showing the door to non-performing teachers sits with the unions is an important and easily answered question.