“…This is remarkable as Nicholson, compares the role of gamemasters to the role of good teachers; only intervene in the process when needed. In our review, some studies describe the nature of the guiding; affirming and encouraging students to work as a team (Carrión et al, 2018), giving instructions (Järveläinen & Paavilainen -Mäntymäki, 2019;Morrell & Ball, 2019), verifying answers and reasoning (Guigon, Humeau, & Vermeulen, 2018;Monaghan & Nicholson, 2017), or checking whether techniques or skills are correctly performed (Adams et al, 2018;Eukel et al, 2017;Franco & DeLuca, 2019;Gómez-Urquiza et al, 2019). In four ERs, staff guided in a way that teams roughly make the same progression, preventing teams to diverge too much, with one team ahead of the others finishing the game and learning process for all teams (Cain, 2019;Guigon et al, 2018;Peleg, Yayon, Katchevich, Moria-Shipony, & Blonder, 2019;Wu et al, 2018).…”