PARCC
Before No Child Left Behind, The Elementary and Secondary Education Act was passed in 1965 as a part of the "War on Poverty". In hopes of diminishing the achievement gap, the Elementary and Secondary Education Act was passed to create equal opportunity and access to education through high standards and accountability. These standards and accountability techniques came in the form of standardized testing. For the first time, federal money was being sent into local schools and made the production of test-based evidence mandatory for all educators. Standards were being assessed on these state-created exams, and local schools were then accountable to perform on these exams. In 2002, Congress re-examined ESEA and reauthorized it as No Child Left Behind Act (NCLB).
List of middle schools in England
Middle schools were permitted by the Education Act of 1964, which made additional arrangements to allow for schools which crossed the traditional primary-secondary threshold at age 11. Notably, these changes did not define a new type of school, but rather permitted a variation on existing schemes, while providing for regulations which allowed the Secretary of State to determine whether such schools should be treated as primary or secondary. 
This had not been provided for in the Education Act of 1944.