On this broader subject, see the long-running thread re: organising academic stuff.
This speaks to this ‘organising academic classes’ issue. In your example there you wouldn’t have an entire category dedicated to 31 English 101
. This remains an issue to be solved; ref. other thread.
It’s been a looooonnng time since I’ve studied anything but my gut feel is that this would be okay. The more I do this the more I expand what a single ID can contain.
This rule has been relaxed to ‘avoid creating subfolders’. In some situations I now think that subfolders are fine.