This volume describes how ESOL tests and test users have changed greatly in the past few decades. Some widely used ESOL tests have been revised, with a number of new tests incorporating advances in computer technology. In addition, many more ESOL practitioners than in the past are responsible for selecting and using tests. Stephen Stoynoff and Carol A. Chapelle introduce teachers and administrators to the principles, methods, and vocabulary of language assessment. Twenty-one reviewers of ESOL tests consider test purpose, methods, and justification of their use in particular situations.