“…In expanding the education market in Poland, the most significant growth in the international school context was noticed with the appearance of new types of international schools within the public education sector, providing international programmes for local families seeking an alternative for their children (Leek, 2022). Research on international programmes has been conducted so far mainly in relation to students and schools as socio-cultural organizations (Doherty, Shield, 2012;Edwards, Underwood, 2012;Lee et al, 2014;Maire, 2021;Outhwaite, Ferri, 2017;Resnik, 2014;Siskin, Weinstein, 2008;Tarc, 2009;Theokas, 2013;Wright, Lee, 2020). Little is known about the professional development and learning of the teachers implementing international programmes, the functions of learning of teachers in International Baccalaureate schools, how teachers organize learning within an interdisciplinary curriculum, what is the specificity of their work in international schools, or what challenges these teachers must deal with.…”