Waste is an environmental problem that requires proper management, including the implementation of recycling. Increasing students’ knowledge about waste recycling can be supported through education in the school environment. This study aimed to determine the difference in knowledge among sixth-grade students at SD Negeri 1 Peukan Bada regarding waste recycling before and after education. This study used a quantitative approach with a pre-experimental method and a One Group Pretest-Posttest Design. The population and sample consisted of all 35 sixth-grade students at SD Negeri 1 Peukan Bada, selected using total sampling. Data were collected using a questionnaire through pretest and posttest measurements after education covering types and sorting of waste, the 3R concept, waste recycling methods, and the environmental impacts of waste. Data were analyzed using univariate and bivariate analyses with the Wilcoxon Signed Ranks Test. The results showed that before education, most students had a poor level of knowledge, consisting of 16 students (45.7%), while after education, most students had a good level of knowledge, consisting of 29 students (82.9%). The Wilcoxon test showed a p-value <0.001. In conclusion, there was a significant difference in students’ knowledge before and after receiving waste recycling education.
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