In the book Dinaric Perspectives on TIMSS 2019: Teaching and Learning Mathematics and Science in South-Eastern Europe, invited national experts from across the Western Balkans rigorously review IEA’s Trends in International Mathematics and Science Study (TIMSS) 2019 grade four data. Together, authors from Albania, Bosnia and Herzegovina, Croatia, Kosovo*, Montenegro, North Macedonia, and Serbia, in collaboration with coauthors from IEA use unique opportunity to gather and exploit robust comparative regional data about the neighbouring education systems. The international collaborative research presented in this book identifies both similarities and differences among these educational systems, sharing useful information about the relative strengths and weaknesses of each, designed to inspire peer learning and improve progress toward quality education for all. Secondary analysis of the TIMSS data has provided some contextual understanding for educational authorities across the Dinaric region to view their own educational aspirations, connect their practical experience with empirical evidence, and together advance educational collaboration across the region.