Last saturday on TBS I watched Good Times episode 20 "The IQ test" and I just watched the Diff'rent Strokes episode 5 "Prep School" on TNN. Though most of both episode are different the conclusion is the same. Table turned on administrator when the main characters give him a test about life in the gueto.

And to a lesser asstent The Facts of Life episode 4 "I.Q., but that episode has nothing to do with a gueto life test.

All of these shows were done by the same production company, they might have had the same writers for both episodes.