Assessing the Effectiveness of Project-Based Learning: A Comprehensive Meta-Analysis of Student Achievement between 2010 and 2023

P roject- Based Learning (PBL) has been lauded as a robust alternative to traditional, didactic instructional methods. Despite its growing adoption, comprehensive syntheses of its effect on student learning remain scarce. This study aims to fill this gap by systematically reviewing and meta-analyzing the impact of PBL on students' academic performance across various disciplines. Employing the PRISMA guidelines, we evaluated 70 research articles published between 2010 and 2023 that quantitatively measured PBL educational outcomes. Our analysis, facilitated by advanced meta-analysis software, revealed a consistent, moderate to substantial enhancement in student performance under PBL compared to conventional teaching. The aggregate mean weighted effect size (d+) was 0.652, indicating a significant and positive influence of PBL on academic achievement. This effect persisted across different sample sizes and time frames within the study period. The findings underscore PBL's superiority in fostering academic success, particularly in science subjects. Consequently, this article contributes to the scholarly discourse by delineating the specific conditions and magnitudes of PBL's effectiveness and recommends its broader implementation in educational strategies. Based on the robust findings of this meta-analysis, the study strongly suggests education institutions integrate PBL, particularly in science education. Additionally, the study advocates for continuous, empirical research to refine and optimize PBL methodologies, ensuring their evolving effectiveness and adaptability in the dynamic landscape of educational pedagogies .