Justice Ginsburg, concurring:
The Court constantly observes that the School District’s drug-testing policy applies only to students who voluntarily participate in interscholastic athletics. Correspondingly, the most severe sanction allowed under the District’s policy is suspension from extracurricular athletic programs. I comprehend the Court’s opinion as reserving the question whether the District, on no more than the showing made here, constitutionally could impose routine drug testing not only on those seeking to engage with others in team sports, but on all students required to attend school.