This week is "Teacher Appreciation Week".  I didn't know it until I  saw the Huffington Post article "Teacher  Appreciation Quotes: Famous Sayings For Teachers And About Teaching".
My  favorites was
"In teaching you cannot see the fruit of  a day's work.  It is invisible and remains so, maybe for twenty years."  - Jacques Barzun
If this isn't a rebuke of merit pay  and the idea of easily measurable teacher performance, I don't know what  is.
However, one of the commenters (LeoWong) to the  article wrote that Barzun didn't write this, but about the artistic or  intellectual life.
I looked and looked for a more  direct attribution but could only find the same quote over and over  again with no source citation other than Jacques Barzun.
So,  I wrote a WikiQuote  entry to ferret out some more information.  We shall see what  happens. [It was deleted.  I won't go into the reasons here.]
 
