This research was intended to develop a model of supplementary English materials based on local content for the eighth-grade students of SMP Negeri 9 Palangka Raya in the second semester. In this research, the researcher adapted the development model proposed by Sugiyono (2013:298) with the following steps: need assessment, data analysis, and reference of the research, development of a model of supplementary English materials, expert validation, revision, try-out of the model, revision, and

more »

... l product. The instruments used in this research consisted of questionnaire, interview, and observation. The data obtained were analyzed and described qualitatively. The final product of this research was a model of supplementary English materials based on local content. The materials were divided into three units.