The purpose of this assessment probe is to elicit students’ ideas about reflection of light. It can be used to examine how students use ideas about light to explain how we see objects in a mirror. Elementary school students investigate reflection of light with mirrors. Their experiences are observational at this stage. Middle school students learn how mirrors work and connect their expanding knowledge of light reflection to different types of objects that reflect light. High school students develop sophisticated ideas related to optics. They learn about how light interacts with different types of mirrors, such as concave and convex. Teacher notes, standards, assessment, and references are provided. This book selection also includes the Table of Contents, Dedication, Preface, Introduction, and Index.