These index cards provide improvisation prompts. They contain words to use and suggestions for actions to use in a game of improvisation. One grouping of words and actions per index card. Seeing them laid out next to each other obviously reminded me of the use of index cards in personal learning/knowledge systems that are based on physical cards or made digitally (keeping one thing per note file), as well as of flash cards (like for spaced repetition). And it made me think of Chris Aldrich who collects examples of using index cards like these, as well as of Peter who is part of an improv group. This set contains 108 cards with ‘nuclei’ of words and actions for improv. They were created by Jackson Mac Low in 1961 as ‘nuclei for Simone Forti‘ after seeing her perform in Yoko Ono’s loft. They were used by her as well as by Trisha Brown. I came across this set of cards at the ‘Fondation du doute‘, the institute of doubt, in Blois, in a exhibition on the postmodern ‘Fluxus‘ movement that Jackson Mac Low participated in for some time.