This book takes readers through the often confusing landscape of standardized testing and explains what tests are and what they are not. The book discusses how to interpret test scores, different types of standardized tests, and specific standardized tests. This revised edition also contains discussions of the Third International Mathematics and Science Study and the Leave No Child Behind Act. The chapters are: (1) Why You Should Read This Book; (2) Testing, Testing, Testing; (3) Standardized Tests, Social Policy, and the Purpose of Education; (4) Standardized Tests; (5) Specific Tests; (6) Interpreting Test Scores; (7) Some Terms and Technicalities; and (8) Conclusion. Four appendixes contain comments on the report, a discussion of some other indicators of achievement, the American Educational Research Association position statement on high-stakes testing, and a review of a book on standardized testing. Contains an annotated list of 13 resources for further reading.(SLD)