This six-volume set LNAI constitutes the refereed proceedings of the 27th International Conference on Artificial Intelligence in Education, AIED 2026, held in Seoul, South Korea, during June 27–July 3, 2026.The 143 full papers and 165 short papers presented in this book were carefully reviewed and selected from 1241 submissions.The conference program comprises seven thematic tracks:Track 1: Technical Aspects of AIEDTrack 2: Human Aspects of AIEDTrack 3: Societal Aspects of AIEDThis year's theme, "From tools to teammates: human-AI synergy for Augmented Learning", highlights research on human and AI agency, collaborative intelligence, and human & AI co-evolving.