This paper describes a computer supported collaborative learning (CSCL) in a ubiquitous computing environment. In the system called CLUE, the learners provide and share individual experience and interaction corpus and discuss about them. This paper focuses on the design, implementation, and evaluation of knowledge awareness map. The map visualises the relationship between the shared knowledge and the current and past interactions of learners. The map plays a very important role for finding peer helpers, and inducing collaboration.