Studying one's teacher education practices is a multi-faceted activity.Critical reflection by educators is advocated as involving not only autobiography and theory, but also our students and our colleagues.Learning from and with colleagues can take many forms. This article discusses the authors' experience with reciprocal classroom observation in Teacher Education. Peer observation supported our learning about our own teaching, providing suggestions for change as well as reassurance. In this article, we make connections between learning from each other, and from ourselves, our students and theory. Specifically, we address what we learnt about pedagogy, in relation to missed opportunities, teacherdirectedness and articulating purpose; about curriculum, in relation to balance and standards; about our students, in relation to their backgrounds as well as 'social tensions'; and about ourselves as teachers and learners, in relation to rapport, role modeling and collegiality. We demonstrate how peer observation can be a valuable component of ongoing professional development for tertiary teachers.At first sight collaboration and self-study may seem contradictory, perhaps even incompatible. The approach of self-study evokes images of introspection by the lone teacher, involved in "monologic research" (Guilfoyle, Hamilton, Pinnegar & Placier, 2004, p. 1140 about her or his own personal and professional practice and identity. Self-study thus seems a solitary rather than a collaborative pursuit. In contrast, Bodone, Guδjónsdóttir and Dalmau (2004, p. 771) propose that "there is a strong and intrinsic relationship between collaboration 3 and self-study research," a claim which we found was supported by our practice of collaborative self-study as reported in this article.The benefits, and even necessity, of constructive and collaborative dialogue with colleagues for improving one's teaching practices are recognized by scholars in the fields of self-study and of higher education research. Such collaboration can counter critiques of limited validity or even self-justification in self-study projects (Loughran & Northfield, 1998).Critical reflection on our work as teachers benefits from gaining information from a variety of sources, including autobiography, theoretical literature, our students and our colleagues (Brookfield, 1995). Recognizing that academics are used to a high level of autonomy in their teaching, Brookfield (1995) argues that,Talking to colleagues about what we do unravels the shroud of silence in which our practice is wrapped. Participating in critical conversations with peers opens us up to their versions of events we have experienced. Our colleagues serve as critical mirrors reflecting back to us images of our actions that often take us by surprise. (p. 30) Such collegial conversations can take many forms, from informal chats over coffee, to more formal opportunities for gaining and giving feedback. For example, Ramsden and Dodds (1989) suggest debriefing with a colleague after a class or course in order t...