Hiroshima University, Japan
Tsukasa Hirashima received his B.E., M.E. and PhD from Osaka University in 1986,1988 and 1991 respectively. He worked at The Institute of Scientific and Industrial Research, Osaka University as a research associate and lecturer from 1991 to 1997. During 1997-2003, he worked in Graduate School of Information Engineering at Kyushu Institute of Technology as an associate professor. He has been a professor of Graduate School, Department of Information Engineering, Hiroshima University since 2004. His main research topic is “Structure-based Learning by Building”, for example, “Learning by Problem Posing in Arithmetic/Mathematic” or “Kit-Build Concept Map”. Some of the systems that he developed have been practically used in several elementary schools, junior high and high schools for several years.