This book also provides examples of assessment strategies for ESD. The assessment of ESD learning outcomes and learning processes is usually challenging, but it is important to determine how to evaluate ESD learning outcomes to reveal whether we achieve our ESD goals or not. For this reason, the assessment section of the book includes theoretical concepts and measurement tools for evaluating sustainability competencies and learning outcomes. Through the close and active collaboration of 22 authors from Germany, Italy, Slovenia, Sweden, Turkey, and the UK, good models for ESD implementation in primary and secondary education are presented.