The purpose of this assessment probe is to elicit students’ ideas about Earth’s tectonic plates. The probe is designed to uncover commonly held misconceptions about Earth’s plates. Plate tectonics is the unifying theory that explains the past and current movements of the rocks at Earth’s surface and provides a framework for understanding its geologic history. Plate movements are responsible for most continental and ocean-floor features and for the distribution of most rocks and minerals within Earth’s crust. This probe is best used with grades 5–12 and can be combined with the card sort formative assessment classroom technique. A materials list, teacher background information, references, assessment, and outcomes are provided. This book selection includes the Table of Contents, Foreword, Preface, Acknowledgments, About the Authors, Introduction, and Index.