In 1969, the Supreme Court ruled that public school officials could not restrict students from wearing black armbands as a peace sign protesting the U. S. involvement in the Vietnam War, ruling that students do not shed their constitutional rights at the schoolhouse gates. In 2007, the Supreme Court held that public school officials could restrict students from engaging in speech that might undermine the school’s zero tolerance policy on drug use. What factors do you think might explain the Court’s decisions in these two cases?