Contents. Preface. Keynote. Invited speakers. Agent models. Analysis of collaboration and group formation. Authoring tools. Collaboration and argumentation. Collaborative knowledge building. Evaluating adaptive systems. Evaluating tutoring systems. Foundational issues for AI-Ed. Intelligent multimedia. Learning companions. Metacognition. New directions. Simulation: systems and architectures. Skill acquisition and assessment. Student modeling. Supporting learning communities. Supportive collaborative learning. Supporting mathematics learning. Support for medical education. Understanding texts and dialogues. Virual realities and virtual compuses.