Abstract
This paper explores how participation in research activities can function as a space for teachers of mathematics to share, negotiate, and re-evaluate their conceptions of student success. Drawing on a case example from a broader mixed-methods study, the paper illustrates how dialogic, activity-based research prompted moments of hesitation, tension, and reflection that extended beyond data collection. The findings suggest that research participation itself can support professional sense-making and reveal the conditions that shape how success is conceived and enacted in mathematics classrooms.