My work as a mathematics teacher educator (MTE) and the research I do are closely interlinked, therefore I observe and report on experiences of teaching and learning mathematics, seeking a connection between research and practice, interested in the context of basic education schools. In this chapter, I rely on my experiences to make connections with the mathematics education literature in order to tell the story of the transformations and movements that have taken place in my life and to reference the meanings produced regarding my professional development. This is a time sequence that covers part of my professional career as a math teacher and as a MTE, in which I intend to highlight how I became a teacher researcher.