For this 15th iteration of the International Conference on Educational Data Mining (EDM 2022), the conference was held in Durham, England, with an online hybrid format for virtual participation as well. EDM is organized under the auspices of the International Educational Data Mining Society. The theme of this year's conference is Inclusion, Diversity, Equity, and Accessibility (IDEA) in EDM Research and Practice. This theme emphasizes the importance of considering and broadening who is included--or not included--in EDM, and why. the theme speaks to the importance of IDEA considerations in all stages of the research process, from participant recruitment and selection, data collection, methods, analysis, results, to the application of research results in the future. The conference features three invited talks: Jennifer Hill, Professor of Applied Statistics at New York University; René Kizilcec, Assistant Professor of Information Science at Cornell University; and Judy Robertson, Professor of Digital Learning at the University of Edinburgh. This year's conference also includes an invited keynote talk by the 2021 winner of the EDM Test of Time Award. The talk is delivered by Tiffany Barnes, Distinguished Professor of Computer Science at North Carolina State University. [Individual papers are indexed in ERIC.]