This study explores the impact academic teachers' writing of a teaching portfolio can have on their professional learning. Through an open-ended questionnaire, 26 academics from three faculties reported on insights, effects on teaching practice, and effects on collegial exchange that the portfolio writing entailed. We discuss how the experienced impact relates to the three competence levels excellence, expertise and scholarship of teaching and learning. With regard to academic development, we conclude that the writing of reflective teaching portfolios has the potential of contributing to an emerging academic community of practice characterised by a scholarly approach to teaching and learning.