On November 14, 2005, the U.S. Supreme Court announced its decision in "Schaffer v. Weast." This special education decision concerned which party bears the burden of persuasion when parents challenge a school district's Individualized Education Program (IEP) in a due process hearing. In this article, we define burden of persuasion and explain its application in Individuals with Disabilities Education Act (IDEA)-related cases prior to Schaffer; we discuss the relevant history of the case; we summarize the facts and analyze the reasoning of the majority, concurring, and dissenting opinions in the Supreme Court's decision; and we address the implications of the Schaffer decision for special educators and for the parents and children served by the IDEA. (Contains 2 tables.)