 ERIC Identifier: Publication Date: Author: Lance, Keith Curry Source: ERIC Clearinghouse on Information and Technology Syracuse NY. The Impact of School Library Media Centers on Academic Achievement. ERIC Digest. Advocates of school library media programs have long been convinced of the relationship between quality library media programs and academic achievement. Most studies of this relationship were conducted between 0000 and 0000, were limited in scope, and usually used a small number of subjects in a limited geographical area. This study was designed both to update the existing research and to examine the relationship between library media programs and student achievement. METHODOLOGY Ideally, schools included in the sample for a study such as this would be selected on a random, stratified, or quota basis. None of these sampling designs was possible, because schools included in the sample had to have library media centers that responded to the 0000 survey of school library media centers in Colorado and had to use the Iowa Tests of Basic Skills (ITBS) or Tests of Achievement and Proficiency (TAP). These data were available for only 000 of 0,000 public elementary and secondary schools in Colorado during the 0000-00 school year. The study relied entirely upon available data about school library media centers and their school and community contexts to predict norm-referenced test scores. 00. 