This open educational resource (OER) is part of the European project GEDIS – Gender Diversity in Information Science: Challenges in Higher Education, co-funded by the European Union. The OER “User Experience: UX” introduces the fundamental principles of usability, accessibility, usefulness, and credibility in the design of interactions between people and digital resources. Its aim is to support teachers and librarians in improving the quality of user experience through methods such as evaluation, prototyping, and information architecture.