1. Naedong Middle School, Gimhae, South Korea
2. Gyeonggi Science High School for the Gifted, Suwon, South Korea
3. Dong Middle School, Changwon, South Korea
4. Ungnam Middle School, Changwon, South Korea
5. Daegu Science High School, Daegu, South Korea
6. Department of Mathematics, University of California, Los Angeles, USA
7. Department of Mathematical Sciences, Seoul National University, Seoul, South Korea
8. Daebang Middle School, Changwon, South Korea
9. Department of Mathematics Education, Kyungnam University, Changwon, South Korea