This poster outlines a collaborative scheme of peer observation of teaching across Dublin City University (DCU), Maynooth University (MU) and the Royal College of Surgeons in Ireland (RCSI). Peer observation of teaching is recognised as an important feature of effective professional development in education (Carbone et al, 2015; Steinert et al. 2006). Use of peer observation may mean that teaching is seen as a topic for communal discourse and a sense of community may be developed, encouraging all teaching staff to consider teaching as a scholarly activity (Chism, 2007). In 2016/2017, a pilot peer observation of teaching project was launched as a collaboration between RCSI; DCU & MU. Over 6 months participants (n=12) from the three institutions engaged in cross-disciplinary and cross-institutional peer observation of teaching. The process was supported by workshops on reflection, reflective writing and feedback. This poster will focus on key learning points from the implementation and evaluation of the project, including the benefits and challenges of developing a multidisciplinary/multi institutional approach; the support required for participants; models of observation and feedback mechanisms, and methods to continue the learning from the initial establishment of a peer observation community of practice.