Recent findings from the Program for International Student Assessment (PISA) reveal that Filipino students math, reading, and science skills lag behind the global average, with no significant improvement since 2018. This study aimed to evaluate the effectiveness of an intervention program at Mario Z. Lanuza Elementary School designed to enhance the numeracy skills of third-grade students. The program combined peer tutoring through a Study Buddy system and self-directed learning using modules. The results indicate that the Study Buddy approach, paired with self-learning modules, led to significant improvements in students numeracy abilities. Prior to the intervention, the mean numeracy score was 19.83 (39.66%), categorized as Low, indicating substantial challenges in understanding numeracy concepts. After the intervention, the mean score increased to 23.23 (46.46%), classified as Moderate. This improvement highlights the interventions effectiveness in narrowing the numeracy skills gap. Statistical analysis confirmed the significance of the results, demonstrating that the Study Buddy intervention significantly improved numeracy skills. Based on these findings, the use of the Study Buddy system in combination with self-learning modules is recommended for continued implementation to foster student engagement and academic growth.