“…The fifteen STEM ERs show a greater diversity in puzzle paths; sequential, path-based and hybrid puzzle paths, see Appendix I The use of a sequential puzzle path is four out of five times explained; students need to work according to a learned sequential analytic or other method (Healy, 2019;Järveläinen & Paavilainen -Mäntymäki, 2019;Vergne et al, 2019), or follow the historical footsteps of a scientist during his discovery and its consequences in time (Dietrich, 2018). The choice for path-based or hybrid structures (Borrego et al, 2017;Ferreiro-González et al, 2019;Guigon et al, 2018;Ho, 2018;Lopez-Pernas et al, 2019;Peleg et al, 2019;Watermeier & Salzameda, 2019) is motivated by the stimulation of active or collaborative learning by means of positive social interdependency. Students need to discuss the relation of the puzzles and build on each other's knowledge by forcing teams alternatively to split and cooperate during the gameplay (Borrego et al, 2017;Craig et al, 2019;Ferreiro-González et al, 2019;Giang et al, 2018;Guigon et al, 2018).…”