Columbia subject headings:
Harvard subject headings:
Educational surveys--United States.
High schools--Curricula--United States
High schools--Curricula--United States--Statistics.
High schools--Curricula--United States.
High schools--United States--Curricula--Statistics.
Princeton subject headings:
Educational surveys--United States.
High schools--Curricula--United States.
High schools--United States--Curricula--Statistics.
Statistics.