index card
US /ˈɪn.deks ˌkɑːrd/
UK /ˈɪn.deks ˌkɑːrd/

1.
fiszka, karta indeksowa
a small card used for writing notes, often for organizing information or for studying
:
•
She wrote her presentation notes on index cards.
Zapisała notatki do prezentacji na fiszkach.
•
He used index cards to study for his history exam.
Używał fiszek do nauki do egzaminu z historii.