There was a university in New England where the students operated a “bank” of term papers and other homework assignments. There were papers to suit all needs and as it would look odd if an undistinguished student suddenly handed in a brilliant essay, there were papers for an A grade, a B grade and a C grade.
A student who had spent the weekend on pursuits other than his assignment, went to the “bank” and as his course was a standard one he took out a paper for a inconspicuous C, retyped it and handed the work in.
In due course he received it back with the professor’s comments “I wrote this paper myself twenty years ago. I always thought it should have had an A, and now I am glad to give it one!”