Columbia subject headings:
Education, Elementary--United States--Statistics.
Education, Secondary--United States--Statistics.
Public schools--United States--Statistics.
Harvard subject headings:
Education, Elementary--United States--Statistics.
Education, Secondary--United States--Statistics.
Public schools--United States--Statistics
Princeton subject headings:
Education, Elementary--United States--Statistics.
Education, Secondary--United States--Statistics.
Public schools--United States--Statistics.
Statistics.