This is a comprehensive PowerPoint on the subject of similarity in Geometry. It is useful for grades 6-12. The PowerPoint has step-by-step animation to guide students through problem solving. In addition, there are definitions, examples, and word problems. This PowerPoint could replace a chapter of a textbook (except extra practice). It is superior to text in many ways as the animation controls the amount and sequence of information provided. This could be used by a teacher or student. Open the PowerPoint up and click through one slide at a time to see for yourself. You can teach yourself similarity with this PowerPoint.