Postulat: Jurnal Inovasi Pendidikan Matematika (e-ISSN: 2723-0600; p-ISSN: 2723-0597) 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. This journal managed and published by Department of Mathematics Education, Faculty of Teacher Training and Education, Universitas Muhammadiyah Gresik, Gresik, Indonesia. Postulat publishes two times a year. The journal consists of high-quality technical manuscripts on advances in the state-of-the-art of mathematics education; both theoretical approaches and practical approaches are encouraged to submit. Submitted papers must be written in Bahasa or English for the initial review stage by editors and further review process by at least two anonymous reputable reviewers. The journal provides a forum for the sharing, dissemination, and discussion of research, experience, and perspectives across a wide range of education, teaching, development, instruction, educational projects and innovations, learning methodologies, and new technologies in mathematics education for authors and readers worldwide. The focus and scope of Mathematics Education Journal include the following topics Realistic Mathematics Education (RME) or Pendidikan Matematika Realistik Indonesia, Design/Development Research in Mathematics Education, Mathematics Ability, and PISA Task