1. Institute of Science Education, Kongju National University, Korea http://science.kongju.ac.kr/phys/shin/experiment/ntnujava/index.html
  2. Dept.of Physics, Chungnam National University http://physics.cnu.ac.kr/ntnujava/index.html
    (korean version) http://www.sbc.pe.kr/mirror/ntnujava/index.html
  3. suwon high school http://www.mankoo.pe.kr/mirror/ntnujava/