<![CDATA[The limited availability of teaching materials for the Natural and Social Sciences (IPAS) subject that integrate the local wisdom of West Kalimantan has resulted in the learning process for topics on animals and plants in elementary schools being less contextual and less engaging for students. This study aims to describe the development process, feasibility, and readability of a local wisdom-based IPAS teaching supplement on the topic of identifying animals and plants for fourth-grade elementary school students. The study employed the Research and Development (R&D) method using the ADDIE model, limited to the analysis, design, and development stages. The research subjects consisted of six expert validators (two subject matter experts, two language experts, and two design experts) as well as fourteen fourth-grade students from Class IV B at SD Negeri 42 Pontianak Kota who served as respondents for the readability test. Data were collected through interviews, Likert-scale questionnaires, and field notes, then analyzed using qualitative and quantitative descriptive methods, including the Borich formula (Percentage of Agreement) and the readability percentage formula. The results showed that the developed instructional supplement achieved a suitability percentage of 93.6% from subject matter experts, 98.1% from language experts, and 95.4% from design experts, all of which fell into the “highly suitable” category. The readability test results for students showed a percentage of 92%, falling into the “very good” category. These findings indicate that the local wisdom-based instructional supplement which features animals and plants native to West Kalimantan, such as the hornbill, arowana fish, and tengkawang tree is suitable for use as a resource to support IPAS learning that is more contextual, engaging, and easily understood by elementary school students.]]>
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