What statement from the tinker v. Des Moines court decision best supports the reasoning that the conduct?

In Tinker v. Des Moines, the Supreme Court stated, "Students do not shed their constitutional rights to freedom of speech or expression at the schoolhouse gate." This statement underscores the principle that students retain their First Amendment rights while at school, reinforcing the notion that their conduct, as long as it does not disrupt the educational environment, is protected. The ruling affirmed that expression, even in a school setting, is a fundamental aspect of individual rights.