The use of social technology in classroom has shown various results. This paper focuses on using social technology as a casebased learning tool. A total of 116 students in a public university in Thailand were formed into teams, and spent two weeks in discussing a Harvard business case via the social technology; Edmodo. After the experiment, an online survey is conducted with these participants to assess the individual learning performance in case-based learning via social technology. Tasktechnology fit (TTF) was also used to assess the impact on learning performance and the tasks that the students perform by using Edmodo as a learning tool. Our findings suggest that social technology be used as a fit learning tool to improve students' understanding of business cases. We concluded that the higher perceived task-technology fit for the social technology, the better learning performance in both near and far knowledge for the students. © (2012) by the AIS/ICIS Administrative Office All rights reserved.