Columbia subject headings:
Education and state--United States.
Educational equalization--United States.
Educational vouchers--United States.
Federal aid to private schools--United States.
School choice--United States.
Harvard subject headings:
Education and state--United States.
Educational equalization--United States.
Educational vouchers--United States.
Federal aid to private schools--United States.
School choice--United States.
Princeton subject headings:
Education and state--United States.
Educational equalization--United States.
Educational vouchers--United States.
Federal aid to private schools--United States.
School choice--United States.