The purpose of this assessment probe is to elicit students’ ideas about the distribution of fresh water. The probe is designed to find out if students recognize that most of Earth’s fresh water is found in frozen form or groundwater. It is best used with grades 3–12, and can be extended by asking students to draw a model showing how they think Earth’s fresh water is distributed. It can lead to a deeper discussion of water resources and the scarcity of clean, fresh drinking water, and its global implications. 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.