Abstract
The study focused on exploring the effects of the performance and attitude in learning fraction concepts by using computer supported collaborative learning (CSCL) for the 3rd grade students. This experiment assists cooperation with computer approach teaching by using Group Scribbles (GS) 2.0 software to support collaborative learning. The statistical analysis of test and questionnaire indicated that CSCL for learning the concept of fraction had the effects of the learning effectiveness and learning retention. The GS-based learning that combined with cooperative learning is loved by the students. Computer supported teaching could provide a diversity teaching model. Group members rely on and help with each other, and could elevate the pupils' motivation and concentration in learning.