Abstract: The objective of this research is to produce a model of course materials of Rejang language as the Mulok in Elementary School. This research was carried out in Elementary School Bengkulu Province. The method used in this research is R and D (research and development) by Borg and Gall. In conducting the research, the model of Borg and Gall has been simplified by the writer from ten steps into three steps based on the characteristics of the research. The three steps are: (1) the preparation of constructing the model; (2) the development of the model; and (3) the evaluation of the model. Instruments used to collect the data were questionnaire, interview, and test. The data were analyzed qualitatively and quantitatively. The finding of the research yields the model of course materials Rejang language in Elementary School. This research concludes that the product of the development of material Rejang language is effective to be applied in Indonesia Elementary School, especially in Bengkulu Province.Abtrak: Tujuan penelitian ini adalah menghasilkan suatru model materi mata pelajaran Bahasa Rejang sebagai muatan lokal di sekolah dasar. Penelitian ini dilakukan di sekolah dasar Provinsi Bengkulu. Metode dalam penelitian ini adalah penelitian R dan D (penelitian dan pengembangan) Borg dan Gall. Dalam melaksanakan penelitian ini model Borg dan Gall ini disederhanakan oleh peneliti dari sepuluh langkah menjadi tiga langkah berdasar pada karakteristik penelitian. Tiga langkah itu adalah: (1) persiapan pengembangan model; (2) pengembangan model; dan (3) evaluation model. Instrumen untuk mengumpulkan data adalah kuesioner, wawancara, dan tes. Data dianalisis secara kuantitatif dan kualitatif. Penelitian ini menyimpulkan bahwa hasil pengembangan materi Bahasa Rejang efektif apabila diterapkan dalam sekolah dasar Indonesia, khususnya di Provinsi Bengkulu.