These labels are great to help organize your classroom library. I've used it to categorize mine into 4 levels (A,B,C,D). This eliminates your students from knowing what level they're on. You can vary it by AR level, theme, seasons, or virtually anything you need organized! I even differentiate with these. Comes with 12 on each page.Just print these out on Avery 2"x2" square labels and stick them onto the books you'd like to organize and voila!