This research was conducted with the aim of examining the effect of the Place Value Numeracy Board learning media (PENAT) on the learning interest of 3rd-grade students, particularly in mathematics with the topic of place value. This study employed a quantitative research approach using a Pre-Experimental Design type: One Group Pretest-Posttest. The sample consisted of all 22 students in the 3rd grade, or in other words, a saturated sampling technique was used, as the entire population was included as the sample. Data collection in this study used a learning interest questionnaire. For data analysis, the Shapiro-Wilk normality test was used because the sample size was small (less than 30 students). Meanwhile, for hypothesis testing, the Paired Sample T-Test was used. Based on the results of data analysis, it was found that the average learning interest score of 3rd-grade students before the treatment (pretest) was 46.54, while the average score after the treatment (posttest) was 52.09. This means that the average learning interest in mathematics increased by 11.92%. Moreover, the result of the t-test using SPSS version 26 showed a significance value of 0.008, which means 0.008 < 0.05 (H₀ is rejected and H₁ is accepted). However, the correlation value between the pretest and posttest data was found to be -0.276, indicating a weak relationship between the two tested variables. Therefore, it can be concluded that the PENAT learning media has an effect on the mathematics learning interest of 3rd-grade students, but the effect is considered weak. This is due to the lack of a strong relationship between the two tested variables, indicating that PENAT media has only a weak influence on students’ interest in learning mathematics.