This volume presents the results of the capstone workshop in the NATO Special Programme on Advanced Educational Technology. It provides a state-of-the-art description, as well as a vision, of how technology can be used to enhance the learning experience. All the authors are active researchers or implementors of advanced educational technology systems. The book is also unique in that it provides an international perspective on how educational systems can be redesigned to take advantage of nascent information technologies. A clear consensus is presented with a focus on how technology-based instructional systems can be more learner-centered.