Columbia subject headings:
School employees--Legal status, laws, etc.--United States.
Teachers--Legal status, laws, etc.--United States.
Harvard subject headings:
School employees--Legal status, laws, etc.--United States.
Teachers--Legal status, laws, etc.--United States
Princeton subject headings:
School employees--Legal status, laws, etc.--United States.
Teachers--Legal status, laws, etc.--United States.