Early career teacher retention and progression are complex issues which inform discourse about and review of pre-service teacher preparation. Debate about how to best connect pre-service teachers' theoretical learning about teaching to practical application and reflection within the classroom (praxis) is ever-present within this dialogue. Extended teaching internship is identified as effective for connecting these elements of learning to teach, through sustained placement activity situated within supportive school environments. These extended experiences are located within communities of practice and facilitate ongoing reflection on transitions from pre-service to early career teaching. The mixed methods research reported here focused on participants' retrospective views of an extended internship and highlighted key elements that connected practice with developing understandings of what it means to be a teacher. Participants' perspectives emphasised how their experiences established vital connections between them and the profession. Analysis of these data underpinned the development of a conceptual framework (Teacher Development and Progression Framework) that illustrates the complex nature of learning to teach and how interdependent factors support momentum and traction into and beyond the early career phase.