◊ The reflections concern student teachers' perceptions and expectations about one's self as a teacher; these are conceptualized as self-attributes considered relevant for the profession. In line with Super and colleagues (1963), we refer to the idiosyncratic constellation of self-attributes as the vocational self-concept. ◊ The process of reflecting on development as a teacher is conceived as a process of sense-making in this thesis. Sense-making is narrative and dialogical in nature and can be triggered by experiences in teacher education (Ezzy, 1998; Hermans, 2002). Yet, sensemaking in relation to one's vocational self-concept already starts the moment a person begins to consider a career as a teacher (Konstam, 2015; Savickas, 1997; Super, 1980), with student teachers actively and iteratively giving meaning to new experiences that provide information about the current and imagined self as teacher (Kelchtermans, 2005; Korthagen, 2005; Rodgers & Scott, 2008). ◊ The process of sense-making may result in an experience of continuity and/or discontinuity: a sense of consistency or inconsistency in the current or to-be-developed attributes that are relevant to the profession (cf. Akkerman & Meijer, 2011; Alsup, 2006; Beijaard & Meijer, 2017). In general, experiences of continuity contribute to well-being and the ability to persevere during development (Caspi & Moffit, 1991; Ibarra & Barbalescu, 2010). Experiences of discontinuity are often perceived negatively because of risks of decreasing self-confidence and frustration. ◊ Experiences of discontinuity seem inevitable in the process of sense-making as student teachers make first steps and have new experiences as professional teachers. Discontinuity can be desirable as a trigger for learning (Akkerman & Bakker, 2011), but also risky because of the potential negative results such as student teacher losing self-confidence and leaving the profession hastily and/or ill-advised. ◊ The process of sense-making is likely to be influenced by teacher educators since reflections, including student teachers' sense of self, their past and their future expectations, are discussed in supervision conversations. Also, the input of the students and the teacher educators in supervision conversations is not a one-way communication, isolated or independent of each other, but perceptions of the past and expectations of the future are discussed and changed in relation to the input of the other by anticipating and responding (Lyra, 1999). Doris: "But there is also a lot of frustration: why can't I just work my way through it? Finish it. Yeah, I don't know why, but I just couldn't do it." [Experience of discontinuity] Audio-taped supervision conversations, i.e., authentic conversations between student teacher and teacher educator throughout the educational course Interviews with six selected teacher educators about student teacher development and supervision approaches. These data allowed us to focus on student teacher development, independent of whether, how and when student teachers comple...