I caught what must have been the last itty bitty tail of that. I was a 3rd grader in 1993 and were taught all about the card catalog and the Dewey decimal system and taking notes on note cards and organizing them in notecard boxes and how important it all was for research. I'm glad we moved on from that. For me, it was a drag.
IIRC from when I visited a library earlier this year, they were still being used in the genealogy section.