Vocabulary is a rich and varied form of one’s language knowledge. It is seriously essential for learning, but conventional vocabulary assessments lack the range and flexibility to support classroom teachers in making instructional decisions. This has motivated McKeown and her colleagues, five leading scholars in vocabulary teaching and/or assessment, to try to bridge the gap by developing an informative book. The volume tackles the complex yet crucial topic of linking assessment to instruction in the domain of vocabulary. For decades, the field of education has been unable to meet the challenge of getting meaningful, useful vocabulary assessment into everyday classroom practice in a way that improves reading outcomes.