Primary education serves as the cornerstone of a nation's educational system, shaping the future of individuals and societies. This article provides a comprehensive review of primary education systems worldwide, drawing on global experiences to identify key lessons learned and best practices. Through a thorough literature review and analysis of primary education systems in various countries, including both developed and developing nations, this study examines the structure, curriculum, teaching methods, assessment practices, and educational outcomes of primary education. Common challenges faced by primary education systems, such as access, quality, equity, and relevance, are explored, along with successful strategies for addressing them. The role of government policies, socio-economic factors, cultural influences, and technological advancements in shaping primary education is also examined. The findings highlight the importance of sharing global experiences and collaborating across borders to improve primary education and ensure equitable access to quality education for all children. This article concludes with implications for policymakers, educators, researchers, and other stakeholders, as well as recommendations for future research and collaboration in primary education.