Equal Educational Opportunities Act of 1974
Congress passed the EEOA as a house bill amending the Elementary and Secondary Education Act of 1965. The only legislative history available for reference is from a similar bill passed in 1972. The House Committee on Education and Labor noted that the bill was significant in that it contained the first "illustrative definition of a denial of equal educational opportunity", and that this lent clarity to schools, governmental authorities, and students as to what, precisely, their rights were.
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.