Curriculum integration disrupts traditional subject-by-subject structures in favour of more interdisciplinary approaches. While cross-curricular teaching and learning has promise, pathways to classroom practice are not always straightforward. In a rich exploration of curriculum integration, this book brings together global perspectives to examine its theoretical foundations and practical applications. The need to create meaningful learning experiences to support student achievement is prioritised throughout. Divided into four key sections, the first introduces key debates and ideas, tracing the historical development of integration and exploring its philosophical underpinnings. The second section dives into disciplinary perspectives, showcasing how integration is applied across STEM, social studies, the arts, and wellbeing, whilst highlighting the risks and rewards of integration across diverse contexts. The final two sections focus on language and literacy integration, as well as the classroom as a dynamic site of practice. Packed full of practical guidance for designing integrated curricula, it emphasises the importance of teacher decision-making, learner interests, and classroom context. The crucial role of knowledge is also considered throughout this book. Curriculum Integration in Primary Classrooms is an invaluable resource for educators, researchers, and policymakers alike, providing the tools and insights needed to navigate the complexities of curriculum integration in diverse educational settings. Far from prescribing a one-size-fits-all approach, this volume invites readers to critically reflect on what curriculum integration is, what it has been, and what it might become.