“…There is a significant body of research on the effects of teachers' non verbal communication in real classrooms (Alibali and Nathan, 2007;Kelly et al, 2008Kelly et al, , 2009Mahon et al, 2010;Wang and Loewen, 2015) and also in virtual ones (Barmaki and Hughes, 2015a). Teachers tend to use a variety of non verbal behaviors to communicate knowledge, including hand gestures (iconics, metaphorics, deictics, and beats), head movements, affect displays, kinetographs, and emblems (Wang and Loewen, 2015).…”