National education crisis averted: https://www.maa.org/sites/default/files/pdf/pubs/focus/Gardner_Hexaflexagons12_1956.pdf https://www.maa.org/sites/default/fil

National education crisis averted: https://www.maa.org/sites/default/files/pdf/pubs/focus/Gardner_Hexaflexagons12_1956.pdf https://www.maa.org/sites/default/files/pdf/pubs/focus/Gardn...