There is no standardized, national American school educational curriculum because of the basic decentralization of the American education system. The primary governmental control of curriculum lies with the 50 states with the national government establishing standards and programs related to national educational legislation. Even so, both private and public American schools exercise a great deal of freedom of choice to determine many aspects of the curricular program.
The American high school diploma, awarded by any accredited American secondary school is formally recognized around the world. With the additional requirements of AP® or IB® Examinations, American high school students have access to study anywhere in the world. As with all other diplomas and secondary school certificates, the recognition of their qualification to study will be directly dependent upon their individual scores, evaluations, language skills, and other personal educational factors: this is true for any student anywhere in the world who wishes to study outside of their own home nation or national education system.