This text guides foreign and second language educators in the use of classroom-based assessment as a tool for improving  both teaching and learning.  While firmly grounded in current research, the presentation is non-technical and does not require specialized background in psychometrics, statistics, or research. The suggested assessment procedures are useful for a broad range of proficiency levels, teaching situations, and instructional approaches.  Preview and follow-up activities assist the reader in applying the material from each chapter.