In the United States, federal law requires states to identify and serve all children (1) _______ disabilities. Public education and health officials in the United States identified approximately 5.4 million infants, toddlers, (2) _______, and youth as disabled in 1994. That same year, the U.S. Department of Education reported that 12.2 percent of all children (3) _______ the age of 21 received some form of special education. The most frequently reported disabilities are speech or language impairments; mental retardation and (4) _______ developmental disorders; serious emotional disturbance; and specific learning disorders, (5) _______ memory disorders.