Through local scientific learning, this action research attempts to improve primary school students' understanding of the nature of science. The target group consisted of nine grade 6 students from a school in Thailand's northeast. The observational tools were the understanding of nature of science test, understanding of nature of science questionnaire test, and interviewing. The research tools were action plans based on local science and observational tools were 1the understanding of nature of science test, understanding of nature of science questionnaire test, and interviewing. Mean, standard deviation, and percentage were used as descriptive statistics. According to the data, students improved their knowledge of science by 62.96 percent after the first learning cycle. Students achieved 92.59 percent of their grasp of science during the second learning cycle. Qualitative data could be used to help future research discussions.