The Tinker Stander is giving students the right of free speech. With this you may not disrupt class or abuse the rights of others. Also I would say that the impact on schools today is that teachers cannot "brainwash" students. Today's students now have the right to learn and express their opinions - obviously in a peaceful manner that does not violate social conduct or infringe on the rights of others.
Bush v. Gore
the enforcement clause
c
a new law fines book publishers for printing content that is considered unpatriotic