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The purpose of this study was to investigate how to improve the collaborative learning to encourage learners' participation in learning activities through CSCL. In addition,this study further to explore the differences of learning achievement from different collaborative learning environment.This study designed an efficient computer-supported collaborative learning (CSCL) mechanism and to develop instant messaging combined with the annotation services as support learning tool. Experimental results demonstrated that different collaborative learning environment have no statistically significant difference on learning achievements. It is notable that our purposed the mechanism can improve interaction between peers, and can encourage learners' participation in collaborative learning activities.