I had an English teacher in high school that sent me home with a deficiency notice for having a 97 average. Her reasoning was that I was slacking off and my parents took as seriously as as if it had been an F. The philosophy she drilled in me was that you can have the best and brightest ideas in the universe and they are worthless if you cannot express them accurately and definitively through verbal and written communication.
Sometimes I wanted to strangle her she pushed me so hard and expected seemingly impossible levels of achievement. But she was extremely fair, honest and forthright and the most insightful person I have ever met to peoples personalities and the differences in the way one learns from one person to the next.
I so respect her and wish more teachers were like her and were paid accordingly.