[nydev]

Great idea, I would use something like this. Would be helpful to add tags/categories with grade level/difficulty if students want to use this for studying at their level.

[viveknathani_]

categories for all problems are already available. is that not what you are looking for?

difficulty of problems will be out soon. though, not in a way where users will be able to assign the difficulty on their own.

thank you for the feedback!