This study analyzes the relationship between students' perceptions of ethnoscience and their interest in learning IPAS among fourth graders at SD Negeri Kassi. The research addresses low learning motivation caused by science materials that often feel disconnected from local culture. Using a quantitative correlational method with 20 students, data were collected via questionnaires and analyzed using JASP. Results showed an average ethnoscience perception score of 31.60 and a learning interest score of 29.50. The Pearson correlation test yielded an r-value of 0.385 (p = 0.093 ), indicating a moderate positive relationship. These findings prove that integrating local wisdom makes lessons more relevant and engaging. It is recommended that educators link local culture to the curriculum to boost students' emotional and intellectual involvement in science.
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