is there a national curriculum in the us
The United States notably does not have one; the establishment of a national curriculum was explicitly banned in 1965, in the Elementary and Secondary Education Act. This act provided federal funding for primary and secondary education ('Title I funding') as part of President Lyndon B. Johnson's War on Poverty. However, most states in the United States voluntarily abide by the Common Core State Standards Initiative, which provides certain uniform standards, See Education in the United States.
National curriculum