My students were working on the Harry Potter sort:
Since I made the sort for all the novels, I included an "I'm not sure yet" category for students!
They try to do this sort every 2 weeks or so and are pleased when they figure out a new piece of information about a character that they can add!
Snag yours here!
(I do have a chronological sort freebie that you can also try out to see if you like my products!)