This book constitutes the refereed proceedings of the 19th International Conference on Augmented Intelligence and Intelligent Tutoring Systems, ITS 2023, held in Corfu, Greece, during June 2-5, 2023. The 60 full papers presented in this book were carefully reviewed and selected from 96 submissions. The papers are divided into the following topical sections: TrackT1 - Tutoring Systems; TrackT2 - Healthcare; TrackT3 - Games; TrackT4 - Neural Network; TrackT5 - Metaverse; TrackT6 - Security; and TrackT7 - Natural Language.