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, B grade and 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 an inconspicious 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!"