This study aims to describe the science learning outcomes after the implementation of Mindfulness Based Learning (MBL) in elementary school students. The study used a quantitative approach with a quasi-experimental design of switching replication type. The subjects were 61 sixth-grade students of SDN Pepe Sedati. Data collection techniques included written tests and observations. Data were analyzed using descriptive statistics, N-Gain scores, and paired sample t-tests. The results showed that the implementation of MBL learning reached 100% with a very good category. The learning outcomes of students in grades VIA and VIB increased significantly. The average score of class VIA increased from 38.3 to 94.3 with an N-Gain of 0.91 in the high category, while class VIB increased from 52.2 to 88.7 with an N-Gain of 0.75 in the high category. Thus, Mindfulness Based Learning effectively improves the science learning outcomes of elementary school students. Keywords: Mindfulness Based Learning, learning outcomes, elementary school.
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