The intent of this comprehensive guide is to help examiners who use the Woodcock-Johnson Psycho-Educational Battery Revised (WJ-R; Woodcock & Johnson, 1989) in school settings to translate these test results into meaningful information for program development. The guide is organized into several chapters. The first chapter presents a brief overview of the diagnostic/prescriptive process. The second chapter describes the WJ-R tests and clusters and the wide range of interpretive information available. Subsequent chapters directly address performance in the four curricular areas assessed by the WJ-R Tests of Achievement: reading, written language, knowledge and mathematics. The last chapter addresses the relationship between the WJ-R Tests of Cognitive Ability and the Tests of Achievement. Relevant research is presented, and specific modifications are suggested for students with low performance in a cognitive area.