With the ubiquity of the Internet and the pedagogical opportunities that digital media afford for education on all levels, online learning constitutes a form of education that accommodates learners’ individual needs beyond traditional face-to-face instruction, allowing it to occur with the student physically separated from the instructor. Online learning and distance education have entered into the mainstream of educational provision at of most of the 21st century’s higher education institutions. With its consequent focus on the learner and elements of course accessibility and flexibility and learner collaboration, online learning renegotiates the meaning of teaching and learning, positioning students at the heart of the process and requiring new competencies for successful online learners as well as instructors. New teaching and learning strategies, support structures, and services are being developed and implemented and often require system-wide changes within higher education institutions. Drawing on central elements from the field of distance education, both in practice and in its theoretical foundations, online learning makes use of new affordances of a variety of information and communication technologies—ranging from multimedia learning objects to social and collaborative media and entire virtual learning environments. Fundamental learning theories are being revisited and discussed in the context of online learning, leaving room for their further development and application in the digital age.