Beta: Jurnal Tadris Matematika (p-ISSN: 2085-5893 | e-ISSN: 2541-0458) is a scientific, peer-reviewed and open-access journal published by Universitas Islam Negeri (UIN) Mataram in collaboration with Asosiasi Dosen Matematika dan Pendidikan Matematika PTKIN (Ad-Mapeta) half-yearly on May and November. It has been indexed in SINTA 2 (Accredited Journal, Decree No.21/E/KPT/2018) by Director General of Strengthening Research and Development, Ministry of Research Technology and Higher Education of the Republic of Indonesia in 2018. The indexing status will be active until 2020. The journal aims to be an open-access journal platform which publishes and disseminates the ideas and researches on mathematics teaching and learning in primary, secondary or undergraduate level. The scopes of the published articles in the prioritized order are: (1) Critical or humanistic perspective of mathematics education, (2) Affects in mathematics teaching and learning, (3) The development of students mathematics literacy, and (4) The development of mathematics teachers (pre-service and in-service) competencies.