Book excerpt: This book brings together policymaker and practitioner knowledge, experiences, and perspectives on the interaction between the assessment and inclusion agenda to the fore. The book’s analysis is built on comparative qualitative data from five different countries on four continents: Argentina, China, Denmark, England, and Israel. These countries have been chosen for their distinctive, and even contrasting, education policies, sociocultural and economic circumstances, and variations in performance across supranational and national standardised student assessments. In addressing these specific contexts, the book provides insights into the pitfalls and synergies which emerge as key stakeholders attempt to mediate these two educational concerns in both policy and practice.