A high school cheerleader who ranted on Snapchat scored an important win in the U.S. Supreme Court last month. But as we appreciate the victory for students and free speech, we should not overlook an accompanying opinion by Justice Samuel Alito.

His legal analysis not only reminds us why balancing free speech with administrative control is such a hard issue in public schools but also why school choice programs further free speech. The case, Mahaney Area School District v. B.L., involved a public high school student who failed to make the varsity cheerleading squad and the softball team.