Since the 1960s early childhood intervention and education has been a national priority. Specifically, federal legislation has mandated the development and delivery of preschool programs targeted to children most at-risk for educational failure due to disabilities and poverty (PL 88–452, 1964; PL 90–358, 1968). Subsequently, the number of preschool programs available for such children has dramatically increased to the point that they are publicly funded in all 50 states, the District of Columbia and Puerto Rico (U.S. Department of Health and Human Services,
2006a). …