The best indicator of teacher quality, according to Dewey, is the ability to watch and respond to the movement of the mind with keen awareness of the signs and quality of the responses her students exhibit with regard to the subject-matter presented (Dewey, APT, 2010; Dewey, 1904). As Dewey notes, "I have often been asked how it was that some teachers who have never studied the art of teaching are still extraordinarily good teachers. The explanation is simple. They have a quick, sure and unflagging sympathy with the operations and process of the minds they are in contact with. Their own minds move in harmony with those of others, appreciating their difficulties, entering into their problems, sharing their intellectual victories" (Dewey, APT, 2010, p. 36). Such a teacher is genuinely aware of the complexities of this mind to mind transfer, and she has the intellectual fortitude to identify the successes and failures of this process, as well as how to appropriately reproduce or correct it in the future.