The aim of International Journal on Teaching and Learning Mathematics is to publish high-quality original research articles or review articles (only for invited foreign authors) on mathematics education which come from international audiences. This journal is designed and devoted to lecturers, researchers, mathematics school teachers, or university students (Master and Doctoral) who want to publish their research reports or their literature reviews. The Journal invites original research articles and not simultaneously submitted to another journal or conference. The whole fields of research in mathematics education are welcome, which includes, but is not limited to the following topics: teaching and learning process, development research, thinking processes, problem-solving, proving, reasoning, ethnomathematics, communication, and educational technology.