When materials are no longer useful or appropriate for those who use the library, they are removed from the collection by the professional staff. The following factors are considered before materials are discarded.
- The physical condition of the item.
- Whether an item has become outmoded by a new or revised edition, or might be purchased in a more technologically advanced medium.
- If the content is outdated. Maps, charts and illustrations should be current and of good quality.
- If the material supports the curriculum and/or continues to be actively used.
- Whether the material adheres to the School Library Bill of Rights endorsed by the American Association of School Libraries.