This text addresses the evaluation of development interventions. It is based on modules developed by the International Programme for Development Education Training, the leading forum for training development evaluators. After a review of the context and history of development evaluation, it discusses the drivers for development evaluation. The discussion emphasises the need for results-based measurement and recommends an evaluation approach built around a theory of change (a theory linking programme inputs to the desired change). A final chapter looks at likely future trends in development evaluation.