Hyosook Jung1
, Woochun Jun2
and Le Gruenwald3
1Yang-dong Elementary School, Seoul, Korea
E-mail : est0718@[login to view URL]
2Dept of Computer Education, Seoul National Univ. of Education, Seoul, Korea
E-mail : wocjun@[login to view URL]
3
School of Computer Science, Univ. of Oklahoma, Norman, OK 7306