Over the past few years, many experimental investigations on the model of project-based learning (PjBL) have affected the mathematical capacity of pupils to solve issues. However, neither the second nor the literature review analysed the combined results of this research. This meta-analysis is aimed at examining and describing the PjBL model's effectiveness in improved student solving mathematical issues in Indonesia. Twelve studies were analysed 2014 to 2021 using Comprehensive Meta Analysis software. The effectiveness of the PjBL model was found to be 1.284 times greater than that of conventional learning models in terms of students' mathematical problem-solving abilities. Additional analysis in the form of study characteristics obtained to bolster the study's findings indicates significant differences at the level of education and publication sources. The application of the PjBL model efficient for mathematical problem-solving abilities when mathematics teachers apply to learn to secondary school students. In addition, researchers should publish their research in the form of articles in reputable journals to improve the quality of their research, the decline in the number of publications over the past three years has allowed many academics to conduct research, the most effective and recommended research sampling technique is the random sampling technique. © 2022 American Institute of Physics Inc.. All rights reserved.
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