Jules Henry Says

The function of high school, then, is not so much to communicate knowledge as to oblige children finally to accept the grading system as a measure of their inner excellence. And a function of the self-destructive process in American children is to make them willing to accept not their own, but a variety of other standards, like a grading system, for measuring themselves. It is thus apparent that the way American culture is now integrated it would fall apart if it did not engender feelings of inferiority and worthlessness.

— Jules Henry, quoted in Walking on Water by Derrick Jensen