Developing teaching materials is important to help students in learning mathematics especially for two-dimensional figure by using Palembang local cultural context. The purpose of the research was to develop whether the teaching materials two-dimensional figure-based on Palembang local cultural context are valid, practical, and have potential effect. The research method used research and development (R&D). The research consists of two stages, namely the preliminary stage and the formative evaluation stage. In one-to-one evaluation involved three students. Then, small group evaluation involved 9 (nine) students in the research. Meanwhile, in field test stage involved 29 students. Data collection techniques employed interviews, tests and documentation. The research was conducted in seventh graders at one of junior high school in Indonesia. The results of this study were the developed teaching materials were categorized as valid, practical and have potential effect. The average score of validity content, construct and product design were 3.65 which was very highly valid level. The practicality of one-to-one was 3.47 and small group evaluation was 3.61 which was at very highly practical level. The teaching materials were categorized as effective. It showed that there were 24 students (82.75%) out of 29 students (17.24%)
