He has been in Dept. of Computer Education at SNUE since 1998. He got both bachelor and master degree from Dept. of Computer Science at Sogang University, Seoul, Korea. He also got his Ph.D. degree from School of Computer Science at University of Oklahoma, Norman, Oklahoma, USA. His research areas include Web-based instruction, mobile learning and gifted education on computer, etc. He has published many research papers on computer education and database area in international and domestic journals and conferences. He has also published some books on computer education. Currently he is a chief editor of the Korean Journal of Information Education.