Proceedings of the Day Conferences. - Nabiul Alam, K. M.; Morgan, Candia; Barichello, Leonardo; Bellamy, Anna; Crisan, Cosette; Geraniou, Eirini; Dowker, Ann; Esmail, Karima; Helliwell, Tracy; Jaworski, Barbara; Treffert-Thomas, Stephanie; Hewitt, Dave; et al. (Research in Mathematics Education, 2017)