Final answer:
Tinker v. Des Moines Independent Community School District (1969) defined First Amendment rights of students in U.S. public schools, stating that in order for a school to ban certain dress or speech it must show that such action is likely to cause a substantial disruption.
Step-by-step explanation:
The landmark Supreme Court decision in Tinker v. Des Moines Independent Community School District (1969) established the First Amendment rights of students in public schools. In order for a school to ban certain dress or speech, it must show that such action is likely to cause a substantial disruption.
Learn more about First Amendment rights of students in U.S. public schools