The coastal area is a residential area of fishermen. In general, kids of fishing families only elementary schools. Therefore, children need to be motivated to be willing to continue their study in junior high school. Thus, needs and should be made a textbook based-on the coastal culture for junior high school (JHS), which was preceded by research activities. The purpose of this study to make the models of supplementary book of mathematics teaching-learning process based-on coastal culture for JHS students. This research activity was a qualitative research. The activities as follows: (1) exploring the coastal culture that can be used as a means to clarify concepts or materials about math, (2) By Focus Group Discussion activity, was prepared a draft of supplementary books of mathematics teaching-learning process based on coastal culture for JHS students. The result is the model of supplementary book of mathematics teaching-learning process based-on coastal culture for JHS students. The conclusion is that mathematics can have benefits in the lives of fishermen, it is expected that the school could become the foundation for improving the pattern of community life of  the fishermen environment in the future for their children.

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