<![CDATA[Numeracy skills are essential competencies that elementary school students must possess in solving problems in daily life. However, mathematics learning that is often abstract and less contextual contributes to students’ low numeracy abilities. Therefore, innovative learning approaches that provide meaningful and real-life experiences are needed. This study aims to determine the effect of implementing outdoor learning assisted by concrete media on the numeracy skills of fourth-grade students. This study employed a quantitative approach with a pre-experimental design using a one-group pretest-posttest design. The subjects of this study were 16 fourth-grade students. Data were collected through numeracy tests (pretest and posttest), observation of student activities, and student response questionnaires. Data analysis used descriptive and inferential statistics, including normality tests and paired sample t-tests. The results showed that the average pretest score of 77.50 increased to 84.38 in the posttest. The hypothesis test indicated a significance value of 0.000 < 0.05, meaning there was a significant difference in students’ numeracy skills before and after the treatment. In addition, student activities and responses were categorized as active to very active during the learning process. The findings imply that outdoor learning assisted by concrete media is effective in improving students’ numeracy skills and creating a more interactive, contextual, and meaningful learning environment.]]>
