The present paper reviews recent studies of CSCL (Collaborative Supported for Collaborative Learning) systems, discusses its problems, and proposes a new approach for its improvement. CSCL systems promote group interaction, enhance a learner's communication skill, and facilitate a learner's knowledge-building. The current CSCL systems focus on the effect of the interaction among group members on a group's performance, but not the effect of the individual learner's abilities on the group interaction and/or performance. In future research, it will be necessary to develop further the interface of CSCL systems which promotes the individual learner's learning and cognitive abilities, and to examine the effect of the new interface on the group interaction and performance. Self-regulated learning skills, which are required when using CSCL systems, would be one of the individual learner's abilities promoted in new CSCL systems.