This study aims to develop descriptive text teaching materials based on local wisdom for seventh-grade students at MTs Negeri 1 Manado. The research problems are: (1) how is the learning need of descriptive text in seventh-grade students of MTs Negeri 1 Manado; (2) what is the form and design of descriptive text teaching materials based on local wisdom; and (3) how effective is the implementation of descriptive text teaching materials based on local wisdom in learning activities. The research employed a Research and Development (R&D) method using the Sugiyono model, which consists of ten stages, ranging from identifying potential and problems to mass production. The research subjects included content experts, media experts, and seventh-grade students. Data collection instruments comprised of questionnaires, tests, observations, and interviews. The data were analyzed descriptively to determine the validity, practicality, and effectiveness of the product. The findings reveal that (1) the developed teaching materials meet the feasibility criteria in terms of content, language, presentation, and graphics with a very feasible category; (2) the teaching materials based on the local wisdom of North Sulawesi attract students’ learning interest and assist in understanding the structure and linguistic features of descriptive texts; (3) the effectiveness test results show an improvement in students’ ability to write descriptive texts, with an N-gain score classified in the medium to high category. The study concludes that teaching materials based on local wisdom are effective in enhancing students’ descriptive writing skills while fostering appreciation for local cultural values.