Karp's section on teacher seniority and how they are reluctant to adapt to new teaching methods struck me while I was reading particularly because of my high school experience.
In my Catholic high school, there were many teachers that had been there for a rather long amount of time. First there was Mr. O, who retired my senior year, he had taught at my high school for 50 years; one would expect him to have a set teaching method considering the fact that he taught the same courses every year: geometry and Latin. Mr. O however managed to defy the odds. He was constantly listening to coworker criticism and actively adapting to his class evaluations so that he could successfully help his students understand the material. This was quite the opposite from what Karp described.