The Journal invites original research articles and not simultaneously submitted to another journal or conference. The whole spectrum of research in mathematics education are welcome, which includes, but is not limited to the following topics: Design/Development Research in Mathematics Education Educational design research is perceived as the systematic study of designing, developing and evaluating educational interventions (programs, teaching-learning strategies, and materials, products, systems) as solutions to such problems. It also aims at advancing our knowledge about the characteristics of these interventions and the processes to design and develop them. Authors could submit their work, either a validation study or a development study in mathematics education, with a comprehensive description and analysis of every stage. Mathematics Ability Mathematics ability refers to the ability (a human construct) to obtain, to process, and to retain mathematical information (cognitive) and to solve mathematics problems (pragmatic). To maintain the focus of this journal, the scope of mathematics ability includes the following abilities: reasoning, connection, communication, representation, and problem-solving. A paper is eligible for this topic if it comprehensively discusses those abilities. Affects in Mathematics Teaching and Learning The scope deals with a basic question, how mathematics-related affects contribute to the teaching and learning of mathematics? The affects in mathematics education can be various topics such as application of models and approaches mathematics learning, beliefs, emotions, self-efficacy, confidence, motivations, identity, mathematics anxiety, etc. ICT in Mathematics Education The advance of information and communication technology (ICT) has been the concern of all human life, including in education. When all students use technology, education must be the first one to utilize it for the sake of effectiveness and attractiveness.