John Marshall Harlan II,
Shelton v. Tucker, 364 U.S. 479 …
“ It is surely indisputable that a State has the right to choose its teachers on the basis of fitness. And I think it equally clear, as the Court appears to recognize, that information about a teacher's associations may be useful to school authorities in determining the moral, professional, and social qualifications of the teacher, as well as in determining the type of service for which he will be best suited in the educational system. ”
