Yamashita, Koichi, Ryota Fujioka, Satoru Kogure, Yasuhiro Noguchi, Tatsuhiro Konishi, and Yukihiro Itoh. 2016. “Practices of Algorithm Education Based on Discovery Learning Using a Program Visualization System”. Research and Practice in Technology Enhanced Learning 11 (August). https://rptel.apsce.net/index.php/RPTEL/article/view/2016-11015.