This paper reports on the relationship between language teacher practices and their collaborations with other teachers through professional development. The paper argues that there is a link between the disposition to use evidence-based practices in language teaching, and ongoing reinforcement of such practices through dialogic exchange in professional practice sessions. Furthermore, the paper understands the learning and development of such disposition as a career-long endeavour, first encountered in quality teacher education programs and then continued by committing to ongoing professional development. Survey data were collected from a group of language teachers from various second languages in primary and secondary schools in [state removed], Australia after they had participated in a workshop on language teaching methodology. The teachers reported extensive use of evidence-based language learning strategies in their classrooms. The paper argues that this disposition is grounded in the ongoing commitment of these teachers to stay in dialogic exchange with colleagues during professional development.