Key Concepts in Educational Assessment provides expert definitions and interpretations of common terms within the policy and practice of educational assessment. Concepts such as validity, reliability, assessment of learning, assessment for learning, measurement comparability and differentiation are discussed, with broad coverage of UK and international terminology. Drawing on the expertise and experience of the authors, who have worked in a wide range of educational contexts, the entries provide: @! clear definitions of the concepts @! accounts of the key issues @! authoritative and reliable information @! suggestions for further reading. Created to support students of education on undergraduate and postgraduate courses, and established education professionals including those who are members of the Chartered Institute of Educational Assessors (CIEA), this book is an accessible guide for anyone engaged in educational assessment. The book offers the reader a clear guide to the complex field of educational assessment, and suggests routes to more detailed study.