Inspired by the human resource management system of Mentoring and the educational methodology of peer teaching, “Mentoring@sch” involves Primary and Secondary Education students from Poland and Greece in the online teaching of ICT, Native and Foreign Languages. Project Teachers (Primary Education) and Mentors (Secondary Education) select overlapping topics from the curricula of both levels. Mentors support Tutors ( Polish and Greek teenage students) in transnational groups so that, adapting Moodle learning management system, Tutors create teaching materials on different topics (English idioms, coding, literature). Tutees (Polish and Greek young pupils) study the material and work collaboratively on the module tasks.