This book offers an insight into the dynamics and complexities of learning and teaching English as a foreign language at primary level. Taking a Dynamic Systems Theory perspective, the chapters present the findings of longitudinal research undertaken in Croatia into the development of English in young learners. The book includes both qualitative and quantitative research and provides insights into internal individual learner factors and external micro and macro contextual factors which impact English learner development. Importantly, it tackles the unique position of English in today's globalised world in detail. It therefore makes a major contribution to work on learning English by the digitalised generation and to understanding the impact of practices in the modern EFL classroom. The volume will appeal to anyone interested in new ways of researching the complex and dynamic phenomenon of the early learning of English.