Adjoint Journal is a journal of education / mathematics education publishing research articles in the field of mathematics education that have never been published. Authors can come from students (Magister and Doctoral), lecturers, teachers, practitioners, and mathematics education enthusiasts. Adjoint is published twice a year, in January and July. The publisher of Adjoint is IAIN Ambon's master's program in mathematics education. The scope of the research covers the theme of realistic mathematics education, teaching and learning process of mathematics, ICT in mathematics education, assessment and evaluation of mathematics education, creativity and innovation in mathematics teaching and learning, psychology in mathematics education, and lesson study in mathematics education.