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Mathematical literacy competency is a competency to formulate contextual problems mathematically, use mathematical facts, concepts, procedures, and interpret and evaluate mathematical outcomes. Mathematical literacy is one of the important competencies that students must master today. One is about the competency content of algebraic literacy or Change and Relationship. But in fact, this competency is still difficult for students to master. Many things cause students' low mathematical literacy competence, one of which is related to learning obstacles. This study aims to analyze students' mathematical literacy competencies based on learning obstacles on Change and Relationship content. The research method used in this study is qualitative research using the didactical design research framework, which focuses on studying learning obstacles. The subjects in this study were students of class VII B JHS 3 Sungguminasa. Data were collected using algebraic literacy tests, interviews, and documents. The data analysis technique carried out in this study was carried out in three stages, namely reducing data, presenting data and drawing conclusions. The results showed that students' mathematical literacy competence was still classified in the moderate to low category. Furthermore, there are types of learning obstacles experienced by students, namely not mastering the steps of solving, not writing known and asked, not writing conclusions, students' lack of understanding of the context of information from the problems given in the form of mathematical sentences, and not being accustomed to working on reasoning-type problems. The important implication that can be given in designing teaching strategies is that teachers should be more creative in providing teaching so that students are more active in the learning process, especially problems involving literacy-based problems.

Change and Relationship; didactical design research; learning obstacles, mathematical literacy