Abstract
Interaction is central in learning processes. E-learning systems can act as mediators in the interaction between the learner and her or his environment, i.e. content, peers, and instructors. Engaging the learner in a learning process through interaction is a central element of successful learning design. The current predominant focus on knowledge transfer in e-learning is partly a result of a lack of interactive multimedia technologies. With the recognition of skills training as being equally important to knowledge acquisition, more work has recently been done on activity-based learning and training supported by interactive multimedia technology. With recent advances in multimedia and Web technologies, a shift from purely knowledge-based learning towards activity-based learning and training can be observed.