Schenck v. United States, 249 U.S. 47 (1919)
Abrams v. United States, 250 U.S. 616 (1919)
Gitlow v. New York, 268 U.S. 62 (1925)
Chaplinsky v. New Hampshire, 315 U.S. 568 (1942)
West Virginia State Board of Education v. Barnette, 319 U.S. 624 (1943)
Tinker v. Des Moines Independent Community School District, 393 U.S. 503 (1969)
Brandenburg v. Ohio, 395 U.S. 444 (1969)
Miller v. California, 413 U.S. 15 (1973)
Island Trees Union Free School District No. 26 v. Pico, 457 U.S. 853 (1982)
Bethel School District No. 403 v. Fraser, 478 U.S. 675 (1986)
Hazelwood Schol District v. Kuhlmeier, 484 U.S. 260 (1988)
McIntyre v. Ohio Elections Commission, 514 U.S. 334 (1995)
Reno v. ACLU, 521 U.S. 844 (1997)
McConnell v. Federal Election Commission, 540 U.S. 93 (2003)
Ashcroft v. ACLU, 542 U.S. 656 (2004)
Morse v. Frederick, 551 U.S. 393 (2007)
Citizens United v. Federal Election Commission, 558 U.S. __ (2010)
Electronic Frontier Foundation
Free Expression Policy Project
Free Speech, American Civil Liberties Union
Freedom of Speech Research Articles and Overview, First Amendment Center