“…While there is a wealth of research on communication, such as the effectiveness of communication aids and techniques (Firth, Elford, Leeming et al, 2008;Lancioni, O'Reilly, Cuvo et al, 2007) and communication training as part of teacher education (Anderson, 2011;Nind, Kellett & Hopkins, 2001), the paucity of information concerning the impact of teaching assistants' knowledge of the development of communication proficiency in pupils with PIMD is striking. Similarly, much of the disability research on training in the management of challenging behaviours was undertaken in care settings (Van Oorsouw, Embregts, Bosman et al, 2010;Williams, Dagnan, Rodgers et al, 2012), with seemingly fewer studies that specifically assessed the impact of such training in educational settings (Hastings, 2005;Ling & Mak, 2012).…”