I did a further search online; the quote appears verbatim in many places, but I can’t find any additional information which would single out a school or teacher, so I would err on the side of assuming it’s fictional.
Apparently it comes from this book. Unfortunately artists don’t seem to do anything like peer review, so if it really did happen I wouldn’t expect it to be shown any more verifiably than this. On the other hand, I don’t particularly trust artists not to make up a story and call it an experiment.
I did a further search online; the quote appears verbatim in many places, but I can’t find any additional information which would single out a school or teacher, so I would err on the side of assuming it’s fictional.
Now I feel dirty.
Apparently it comes from this book. Unfortunately artists don’t seem to do anything like peer review, so if it really did happen I wouldn’t expect it to be shown any more verifiably than this. On the other hand, I don’t particularly trust artists not to make up a story and call it an experiment.