<![CDATA[This study was motivated by the low level of achievement in mathematics learning of students based on the results of the odd semester Final Assessment (PAS) for the 2023-2024 school year, where 50% of students did not reach the minimum score (KKM). This study aims to determine whether there is a relationship between learning concentration and mathematics achievement of fourth-graders at SDN 1 Singkawang. The research method used is correlational research with a quantitative approach. The object of this research is 77 fourth-graders at SDN 1 Singkawang. Data collection was carried out using student learning concentration questionnaires and documentation of student mathematics report scores for the 2023/2024 school year. The data were analyzed using descriptive statistics, testing the requirements of the analysis using normality tests with the Kolmogorov-Smirnov test formula and linearity tests. Hypothesis testing was carried out using the Pearson Product Moment correlation test. The results of the analysis showed that there was a significant relationship between learning concentration and mathematics achievement of fourth-graders at SDN 1 Singkawang, which was indicated by a correlation value of 0.51, which means it has a sufficient criterion based on the level of correlation, so that the relationship is not too strong. Learning concentration is one of the factors that influences students' mathematics achievement, with a contribution of 25.63%. This is indicated by the value of the coefficient of determination (KD) of 25.63%, which means that the magnitude of the relationship between learning concentration and students' mathematics achievement is 25.63%.]]>
