How many sets of guidelines has AASL published?
The first set of library “standards” (not to be confused with student learning standards) was published in 1918 by the National Education Association. For nearly 60 years, successive versions of quantitative standards defined a school library by how many “items” it contained. In 1975, AASL and AECT published a blended document that contained both quantitative standards and guidelines for the development of a school library program.