Book excerpt: This brief, accessible, and inexpensive supplement on American courts and their functions provides undergraduate, or first-year law students, with an understanding of the key substantive and procedural concepts that they need to know to study the law or the judicial process. Recognizing that there are many substantive and procedural concepts about American courts that students must first grasp in order to study the law or the judicial process, this brief text answers important questions about justiciability, standing, jurisdiction, and judicial power. With a stronger historical context, this text is a perfect complement to a text on Constitutional Law, Judicial Process, or a legal casebook, and will help students master the legal vocabulary with which they are confronted.