External representations can be powerful for supporting learners in both individual and collaborative learning scenarios. They encourage learners to focus on important instructional elements. In this study, we investigate two different forms of external representations: textually represented collaboration scripts and graphically represented…

Studies have shown that videoconferencing is an effective medium for facilitating communication between parties who are separated by distance, particularly when learners are engaged in complex collaborative learning tasks. However, as in face-to-face communication, learners benefit most when they receive additional support for such learning tasks.…

Collaborative learning in computer-supported learning environments typically means that learners work on tasks together, discussing their individual perspectives via text-based media or videoconferencing, and consequently acquire knowledge. Collaborative learning, however, is often sub-optimal with respect to how learners work on the concepts that…

This article focuses on facilitating learners' collaborative knowledge construction in case-based learning scenarios. The article first describes how case-based learning can promote knowledge acquisition and then discusses the characteristics of videoconferencing in such scenarios. Then we focus our attention on the process and outcomes of the…