These labels align with Avery 5160 labels and each label has multiple decimal numbers on it that correlate with ZPD ranges in the Accelerated Reader program. ZPD is the zone of proximal development number Accelerated Reader assigns each student after they are tested on their reading level. Students are then instructed to find books that are leveled within these numbers to read. These labels make it easier for students to have their ZPD range accessible and understood. You can place a label for each student on their library card or reading log and highlight or circle their specific ZPD range. Each label sheet correlates to a different ZPD range, starting at 0.1 and going up to 7.9. The numbers on each label also correspond to the Accelerated Reader color for each reading level found on the spines of library books, making it even easier for students to find books within their assigned ZPD range.