The Möbius strip: an elementary exercise providing hypotheses formation and perceptual proof
Lloyd I. Richardson · The Arithmetic Teacher · 1976
An invitation to speak before the fourth-grade class of one of my former students had been accepted. As an enrichment lesson, I had decided to use the Möbius strip and to relate William H. Upson's story (Fadiman 1962), “Paul Bunyan versus the Conveyor Belt,” to the class. Beyond telling the story, any attempts toward hypothesis testing or looking for patterns would depend on class reactions.