Columbia subject headings:
School children--Health and hygiene--United States.
School health services--United States.
School violence--United States.
Schools--United States--Safety measures.
Harvard subject headings:
School children--Health and hygiene--United States.
School health services--United States.
School violence--United States.
Schools--United States--Safety measures
Princeton subject headings:
School children--Health and hygiene--United States.
School health services--United States.
School violence--United States.
Schools--United States--Safety measures.