You will find that grouping you classroom library by author, topic (such as books about animals, school topics, etc.) or genre is one of the best ways to get your kids into your books
. Within those groupings, you may have a way to identify books according to their DRA or AR level for yourself, as you mentioned. We want kids to choose books for two reasons--good fit books and books of interest. If we limit them to the "level" only, we may inadvertently limit their choice of books. Rather than have the kids be so concerned with the level, have them become good book choosers based on the "good fit" book lessons and "3 ways to read a book". If we teach those lessons well, we hope that they will begin to pick appropriately leveled books for themselves. Of course, we can suggest books during our conferring and strategy group time.
Gail tells the story of one of her young students who, on a trip to the local library, didn't check out any books because there were no "blue tub" books there. We don't want that to happen!
You may want to view the video clip that Joan has about this topic. Here's a link: http://thedailycafe.com/articles/classroom-library-design
Also, if you type "classroom library" into the search feature, you will see many examples of teachers at various levels.