Book excerpt: The major focus of this Handbook is the design and potential of IT-based student learning environments. Offering the latest research in IT and the learning process, distance learning, and emerging technologies for education, these chapters address the critical issue of the potential for IT to improve K-12 education. A second important theme deals with the implementation of IT in educational practice. In these chapters, barriers and opportunities for IT implementation are studied from several perspectives. This Handbook provides an integrated and detailed overview of this complex field, making it an essential reference.