Abstract. “Context ” has been a popular topic in recent work on interactive systems, in user modelling, knowledge discovery, and ubiquitous computing. It is commonly acknowledged that understanding context is vital for effectively interpreting and supporting users. Several contributions to this workshop explore the use of context for better understanding and/or supporting learning with electronic, networked media. The purpose of this paper is to start a fruitful discussion by showing commonalities and differences between various notions of context, and to outline challenges for future research. 1 1