The second UNESCO World Open Educational Resources Congress was organized by UNESCO, Ministry of Education, Science and Sport and UNESCO Chair on Open Technologies for Open Educational Resources which has a seat at Jožef Stefan Institute headed by M. Sc. Mitja Jermol. Education ministers from around the world discussed open educational resources (OER) and agreed that the training teachers and motivating them to use ICT technologies in class. They also underlined the importance of the quality of open resources which must be inclusive and available in different languages. The 2017 Ljubljana OER Action Plan presents 41 recommended actions to mainstream open-licensed resources to help Member States to build Knowledge Societies.