This chapter provides a critical and comprehensive review of the internationalisation literature. It starts with a brief discussion of the main factors and features that need to be considered when internationalising the educational administration and leadership field. This is followed by a critique of the internationalisation of education and the many challenges that hinder the achievement of proper internationalisation. The third section provides an overview of the internationalisation models and practices in different disciplines such as psychology, sociology and political science, which is followed by a discussion on the internationalisation of education organisations in different countries with some examples from Arab and non-Western countries. The final section presents a critical review of literature on internationalising the curriculum and how culture competency and knowledge acquisition are key factors in achieving effective internationalisation. The chapter concludes with an overview of the book collection and the main ideas and concepts discussed in each chapter