information:classification, quality:corruption
Historical context

As of the early 1970s, U.S. public schools accommodated 1 out of 5 children with disabilities. Until that time, many states had laws that explicitly excluded children with certain types of disabilities from attending public school, including children who were blind, deaf, and children labeled "emotionally disturbed" or "mentally retarded." At the time, 3.5 million disabled children attended school but were "warehoused" in segregated facilities and received little or no effective instruction. More than 1 million children had no access to the public school system, with many of them living at state institutions where they received limited or no educational or rehabilitation services. About 75% of deaf or blind children attended state institutions.