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Synopsis World-wide, research evidence indicates wide gap between learning potential and learning outcome; underachievement in education has been a significant concern. To alleviate the situation, educational technology has been seen as the most important tool for optimizing human learning. There are breathtaking developments in the understanding of human learning as well as in ICT ushering in a paradigm shift in educational technology. Equally true is the increasing gap between the knowledge creation and knowledge utilization resulting into loss of significant opportunities for optimizing human learning. This gap is likely to increase further. This book for the first time documents current knowledge vis-?-vis selected aspects of educational technology, the state of the art of knowledge utilization, and the gaps, and projects into the future for assessing likely impact on teaching learning process. The book covers a wide range of issues like evolution of educational technology, instructional systems design, communication, online education, Multi-channel learning, Video Conferencing, Open and Distance Education, evaluation of educational technology, and Beyond Educational Technology with contributions from best of the experts in the world. The book is addressed to the educational policy makers, planners, educational managers as well as teachers. The readers will found the book useful.