This two-volume set constitutes the proceedings of the 19th International Conference on Computer Science and Education, ICCSE 2025, held in Osaka & Fukui, Japan, during August 19–24, 2025. The 82 full papers and 2 short papers presented were thoroughly reviewed and selected from the 196 submissions. They were focused on the following topical sections:Part I : AI Technology Frontiers-Computer Science and Data Science; Artificial Intelligence and Machine Learning and Natural Language Processing and Text AnalyticsPart II : AI Shaping Education-AI Applications in Education and Teaching Models and Educational Reform.