“As a teacher and parent, I've had a very personal interest in seeking new ways of teaching. Like most other teachers and parents, I've been well aware — painfully so, at times — that the whole teaching/learning process is extraordinarily imprecise, most of the time a hit-and-miss operation. Students may not learn what we think we are teaching them and what they learn may not be what we intended to teach them at all.”

Illusions : The Adventures of a Reluctant Messiah (1977)
Variant: You teach best what you most need to learn.
Source: Illusions: The Adventures of a Reluctant Messiah

Wadewitz, Adrianne. (August 12, 2013). "What I learned as the worst student in the class" http://www.hastac.org/blogs/wadewitz/2013/08/12/what-i-learned-worst-student-class. HASTAC: Humanities, Arts, Science, and Technology Alliance Collaboratory. — reprinted and cited in: "How Adrianne Wadewitz learnt to embrace failure" http://www.smh.com.au/world/how-adrianne-wadewitz-learnt-to-embrace-failure-20140425-zqzgx.html. The Sydney Morning Herald. April 25, 2014. Retrieved April 25, 2014.

p 33 as cited in: D. Psillos (2003) Science Education Research in the Knowledge-Based Society. p. 44.
Conversation, Cognition and Learning (1975)

On the low social regard for teachers.[Ghate, Chetan title=The Oxford Handbook of the Indian Economy, http://books.google.com/books?id=kPYXpHSVbywC&pg=PA373, 13 March 2012, Oxford University Press, 978-0-19-973458-0, 373–]

Source: Rhythms of Learning