Nazi concept of the ``master race ' By the 1950s special education programs for ID children became increasingly available in public schools . During the 1960s the concept of institutionalization fell out of favor as it was determined that these schools were unable to cure mental retardation and the occupants were brought back into society while the training centers evolved into custodial living centers . The Individuals with Disabilities Act (IDEA ) was created in 1975 this legislation guaranteed the appropriate education for all...











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