The purpose of this assessment probe is to elicit students’ ideas about magnetic interactions. It is designed to find out how students visually represent magnetic interactions. If materials are available, consider demonstrating the probe scenario and note that magnets do not stick to stainless steel refrigerators. It is particularly important to understand that many students do not differentiate between electric and magnetic effects, and this allows for discussion about what is similar and what is different. This discussion can be used at the start of a unit on electricity and magnetism. It is best used with middle and high school students. A materials list, teacher notes, standards, assessment, safety notes, and references are provided. This book selection also includes the Table of Contents, Preface, Acknowledgments, About the Authors, Introduction, and Index.