MEI 10 was a significant milestone for the mathematics education research community in Ireland. The conference theme: Mathematics for a Connected World: Integration, Challenges, and Possibilities, offered the opportunity to reflect on progress, on ‘sticky problems’ and possible ways forward in a changing, and complex, world. It challenged researchers to consider how the ideas of integration and connections play out in relation to mathematics and its teaching. Specifically, the milestone of MEI10 offered the opportunity to reflect on progress and envision the future through consideration of the following interconnected issues: -Disciplinary and interdisciplinary teaching and learning; the role of mathematics across subjects and real-world contexts (Maass et al., 2019) -The role of mathematics education as a response to contemporary challenges, including ecological (Barwell et al., 2022) and societal issues (Bartell, 2018) -Evolving educational and policy landscapes (NCCA, 2024) The conference involved three keynote presentations, three symposia, one workshop, and 40 paper and poster presentations. The keynote presentations were delivered by Dr Thérèse Dooley, Professor Geoff Wake and Dr Mairéad Hourigan. While Professor Wake calls for attention to architecture of learning for rehumanising mathematics, Dr Hourigan argues for a repositioning of mathematics in integrated STEM learning. In addition, a presentation by Emeritus Associate Professor Dr Thérèse Dooley and MEI founding member reflected on the growing mathematics education community in Ireland and recurring and evolving themes evident in MEI papers across the last two decades. In total, these proceedings contain 52 papers from over 100 national and international authors. Papers underwent a peer-review process and were edited and refined by authors, before being accepted for publication in this electronic conference proceedings. The papers document research at all levels of education - early childhood education, primary and secondary schooling, third-level education, in addition to teacher education. These papers are testament to a vibrant, committed research community.