or flash card
[ flash-kahrd ]
/ ˈflæʃˌkɑrd /
a card having words, numerals, or pictures on it, designed for gaining a rapid response from pupils when held up briefly by a teacher, used especially in reading, arithmetic, or vocabulary drills.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for flash card
a card on which are written or printed words for children to look at briefly, used as an aid to learning
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012