index card

US /ˈɪn.deks ˌkɑːrd/
UK /ˈɪn.deks ˌkɑːrd/
"index card" picture
1.

ficha, tarjeta de índice

a small card used for writing notes, often for organizing information or for studying

:
She wrote her presentation notes on index cards.
Ella escribió sus notas de presentación en fichas.
He used index cards to study for his history exam.
Él usó fichas para estudiar para su examen de historia.