The Norwegian National Digital Learning Arena (NDLA) is portal for OER in secondary education. It is a joint initiative between county councils in Norway that allocates a portion of state funds to ensure free access to textbooks for Norwegian students and to develop digital resources (or purchase from publishers or other producers. The project has produced a large amount of OER and there are many thousand resources available from the portal.
NDLA work with 37 different subjects in upper secondary education. The subjects cover academic specializations as well as vocational education and training. In total, there are about 340 subjects in upper secondary education. The long term ambition is to offer digital learning resources within all subjects.