These labels can be used to fit various sized book boxes for a classroom library. These labels are for guided reading book storage, for the library or small group work. Levels A-Z are included as well as a label for O+ which was created specifically for primary classrooms. Since these classrooms may not have many picture books above a level O, they can all be stored in that box. These were created to store leveled books in a tasteful and inviting classroom library setting. Print these leveled labels out, cut to your book box size and laminate or tape onto your box. Created by Plain and Simple Primary.