Adler v. Board of Education (1952) upheld a state law that prevented
members of subversive groups from teaching. Dissenters said the law
violated First Amendment freedoms.

In Board of Regents of States Colleges v. Roth, 408 U.S. 564 (1972), the Supreme Court found that Wisconsin State University at Oshkosh had not violated the rights of an assistant professor of political science David Roth, when it decided not to continue his employment.  Roth had criticized the administration for suspending a group of

In Keyishian v. Board of Regents (1967) was an important decision by the
Supreme Court for the concept of academic freedom as a constitutionally
protected value.

In Meyer v. Nebraska (1923) invalidated a state law that banned teaching
foreign languages to schoolchildren. The law violated the Fourteenth
Amendment’s due process clause.

Perry v. Sindermann (1972) said that public university officials violated
the First Amendment when they terminated a professor for publicly
criticizing the Board of Regents.

In Rendell-Baker v. Kohn, 457 U.S. 830 (1982), the U.S. Supreme Court ruled that New Perspectives School had not acted under color of state law when it dismissed six teachers and counselors for criticizing school policy and supporting a student petition drive that advocated for greater student participation in school hiring. New Perspectives School was a

Shelton v. Tucker (1960) said an Arkansas law requiring schoolteachers to
submit the organizations to which they belonged violated First Amendment
freedom of association.