In this article, we discuss key requirements for collecting behavioural data concerning technology-supported collaborative learning activities. It is argued that the common practice of analysis of computer generated log files of user interactions with software tools is not enough for building a thorough view of the activity. Instead, more contextual information is needed to be captured in multiple media like video, audio files, and snapshots, in order to re-construct the learning process. A software environment, Collaborative Analysis Tool, (ColAT) that supports interrelation of such resources in order to analyse the collected evidence and produce interpretative views of the activity is described.