<![CDATA[This study examines the importance of high-quality teaching materials, particularly textbooks, in achieving English language learning objectives in Indonesia. Textbooks play a crucial role in the Merdeka Curriculum. Therefore, this study aims to analyze the feasibility of the English textbook “English for Nusantara” for eighth-grade junior high school students at SMP Negeri 1 Gunungsitoli Barat, by evaluating its content against Brian Tomlinson's 16 criteria for teaching materials. Employing a Qualitative approach with content analysis on Chapters 1-5, the findings revealed that the textbook substantially meets the criteria, with 14 criteria fulfilled and a high match percentage of 87.5%, placing it in the "Good" category. The two less-fulfilled criteria concerned drawing students’ attention to linguistic features and specific aspects of right-left brain stimulation. Overall, the results indicate the textbook is of adequate and effective quality, providing a systematic structure for grammar and vocabulary, and containing relevant, varied, and high-impact activities. This study contributes valuable input for educators and curriculum developers to improve the quality of teaching materials and optimize student learning outcomes in English.]]>
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