School psychologists have a close, often uncomfortable relationship with the law, as much of what they do from day to day is defined by the Individuals with Disabilities Education Improvement Act (IDEA, 2004) and related state law. However, judges deciding cases often do not have a detailed understanding of how education and schools work, and school psychologists sometimes do not have a deep understanding of the law. As a result, school psychologists must comply with many legal obligations with which they may lack complete familiarity, and the requirements themselves are sometimes unsuited to actual practice. This article describes 11 key special education court decisions and explains how those cases affect the daily practice of school psychologists. School psychologists who are familiar with these cases will be better able to serve their students while complying with the law.