The library in our classroom has been organized, after a fashion.
The cart outside the room has a mixture of books reflecting the first-semester themes of Farm to Table and Ancient Civilizations. Inside the room, the monolithic northern wall of books includes a full bookcase on American Studies (literature, history, sociology) and another full bookcase on Schools and Learning (there's a lot of great research there, and a lot of Harry Potter too).
Smaller sections of one or two shelves include Asia, Africa, Europe, and Britain (all four comprising a combination of literature and history), Soccer and Other Sports, Science & Math, Young Adult Fiction, and Little Kids.
There's a sign-out sheet posted on the wall between the bookshelves and the closet. This is a lending library, so stop in anytime.