What are Open Educational Resources (OER)? Open Educational Resources (OER) are freely accessible and often free-to-use learning materials that are published under open licenses. They enable educators and learners to access, share, modify, and further develop a wide range of educational materials. OER offer a cost-effective way to integrate high-quality learning content into e-learning courses and promote collaboration and the free exchange of knowledge on a global scale. These resources range from textbooks and articles to videos and interactive media.