Anderson, M. / 1974 / Social competency in young children / Developmental Psychology 10 (2) : 282 ~ 293 Carrier, A. C. / 1987 / Pair versus individual work on the acquisition of concepts in a computer-based instructionl lesson / Journal of Computer-Based Instruction 14 (1) : 1 Cortez, C. / 2004 / Teaching Science with Mobile Computer Supported Collaborative Learning(MCSCL) / Proceedings of the 2nd IEEE International Workshop in Wireless and Mobile Techn Ebner, M. / 2010 / Microblogs in higher education: A chance to ficilitatie informal and process-oriented learning? / Computers & Education 55 (1) : 92 ~ 100 Hiltz, S. / 2002 / What makes learning network effective? / Communications of the ACM 45 (4) : 56 ~ 59