Book excerpt: This handbook aims to give readers a thorough understanding of past, current and future research and its application in the field of educational technology. From a research perspective the book allows readers to grasp the complex theories, strategies, concepts, and methods relating to the design, development, implementation, and evaluation of educational technologies. The handbook contains insights based on past experiences as well as future visions and thus amounts to a comprehensive all round guide. It is targeted at researchers and practitioners working with educational technologies.