"The researchers then examined these schools to find what qualities they had in common. Of the five they found, two struck me as crucial: 1) if the students did not learn, the schools did not blame them, or their families, backgrounds neighborhoods, attitudes, nervous systems, or whatever. They did not alibi. They took full responsibility for the results or nonresults of their work. 2) When something they were doing in the class did not work, they stopped doing it, and tried to do something else. They flunked unsuccessful methods, not the children."
•John Holt, How Children Fail (1964)