Columbia subject headings:
Harvard subject headings:
Academic achievement--United States--States--Statistics.
Academic achievement--United States--Statistics
Mathematics--Study and teaching--United States--States--Statistics.
Mathematics--Study and teaching--United States--Statistics.
Science--Study and teaching--United States--States--Statistics.
Science--Study and teaching--United States--Statistics.
Princeton subject headings:
Academic achievement--United States--Statistics.
Mathematics--Study and teaching--United States--Statistics.
Science--Study and teaching--United States--Statistics.
Statistics.