“…Other aspects that have been analyzed in a notable way within the History of Education are UNESCO programs based on the development of educational actions, such as the modernization of school manuals on international understanding (Nygren, 2011;Kulnazarova & Ydesen, 2017;González-Delgado, 2018; or the importance of the transmission and configuration of certain ideas about the construction of models of citizenship within the framework of those same textbooks (González-Delgado, Ferraz- Lorenzo & Machado-Trujillo, 2019). In addition, other topics that UNESCO was responsible for promoting in its educational policies have been investigated, such as the use of technology in education (Hallström, Hultén & Lövheim, 2014;González-Delgado & Groves, 2017;Alves & Guimarães Lima, 2018;, health education (Terrón, Comelles & Perdiguero-Gil, 2017;Terrón, 2020), environmental education (Ferraz-Lorenzo, 2020), the circulation of books, movies and teaching material (Druik, 2006;Giton, 2016) and educational policies themselves through ideas on Educational Planning and UNESCO's association with other international organizations such as the OECD or the World Bank Delgado Gómez-Escalonilla, 2015;Mariuzzo, 2016;Corrales-Morales, 2020;González-Delgado & Groves, 2020).…”