“…Rooted in social constructivism principles [22,23], peer learning is a student-centred approach that gives teachers and learners the chance to experience new roles, privileging the human essence of education based on personal interactions [18,[24][25][26][27]. With evidence-based benefits under the cognitive, but especially affective and social, dimensions [23,[28][29][30][31], peer learning is in line with Dewey's [32] (p. 46) vision of learning "as an active and constructive process", and Vygotsky's principle of autonomous but scaffolded access to knowledge through the "zone of proximal development" [33] (p. 1), based on which both peer teacher students (PTS) and peer learners (PL) are given the chance to be co-constructors of their learning process [3,25,28,34]. Over the past few decades, improvements in peer learning delivery [30] have contributed to its popularity, particularly in cross-level programs in higher education [22,23,28,29], and justify the presence/emergence of different peer learning varieties, such as peer tutoring, and cooperative learning [24], "the longest established and most intensively researched" [30] (p. 632)-peer teaching [23], peer mentoring [30,35], peer-assisted learning [36], or peer instruction [37].…”