This work aims to equip ELT teachers to deal with the types of evaluation they may be involved in during their professional lives: as agents of insider or outsider evaluations or as subjects of evaluation. It provides a framework of the field, a series of case studies illustrating types of evaluation and guidance on essential evaluation procedures. Based on the practical experience of the authors as insider and outsider evaluators of institutions, teacher education programmes, language courses, short training courses and ELT projects, the book should be of value as a guide for practitioners and as a coursebook for students of the field.