Researchers from all over the world are fascinated by the question on how to design powerful learning environments and how to effectively integrate computers in instruction. Members of the special interest groups 'Instructional Design' and 'Learning and Instruction with Computers' of the European Association for Research on Learning and Instruction belong to this group of fascinated researchers. By presenting their research on these questions in this book, these researchers provide empirically based answers, finetune previously suggested solutions, and raise new questions and research paths. The contributions each try to deal with the actual complexity of learning environments, while avoiding naïve simplicity. The book presents an up-to-date overview of current research by experienced researchers from well-known research centers. This book is intended for an audience of educational researchers, instructional designers, and all those fascinated by questions with respect to the design of learning environments and the use of technology.