Circle is a scientific, peer-reviewed and open-access journal which has been established for the dissemination of state of the art knowledge in the field of mathematics education. Author can be lecture, teacher, reseacher, and even student. We recommend a qualitative research, an action research, research and development (RnD), experiment and quantitative research. This journal managed and published by Mathematic Education Department (Tadris Matematika)Fakultas Tarbiyah dan Ilmu Keguruan, Institut Agama Islma Negeri (IAIN) Pekalongan, Indonesia.