This PowerPoint was designed as a comprehensive overview of a 9th grade evolution unit for students to review in preparation for the Pennsylvania Biology Keystone test. It includes a table of contents and 97 slides with button navigation so that students can go through it on their own, at their own pace. Main topics include: (1) What is Evolution?; (2) Natural Selection; (3) Evidence for Evolution; and (4) Evolution in Action. PowerPoint animations are used throughout for pacing and to guide students through the presentation. It could be used as is or divided into parts as a multimedia supplement to the normal textbook.