Science Targets Skills indentified by the GED Testing Service. Based on research by the GED Testing Service, this targets key skills that GED candidates need to focus on to improve their chances of passing the GED tests! Keys to GED Success identifies the types of questions that test takers most commonly miss on the GED Tests and the reasons why. The book includes a recommended study plan that will take the GED candidate to a greater level of success and closer to earning a GED credential.