This research aims to determine the significant effect of Project Based Learning (PjBL) Model on students' writing skills Great Athletes. This research was Quantitative used a True Experimental design. This research was conducted at SMA Negeri 2 Kisaran. The research population was all class X students’ of SMA Negeri 2 Kisaran for the 2023/2024 Academic Year. The sampling technique used Stratified Random with a total sample of 74 students, namely class X-1 as an Experimental class which used a Project Based Learning (PjBL) Model while Class X-3 as a Control class that used a Conventional Model. Data collection instruments include Tests, Questionnaires and Observations. Before being given treatment, the mean pre-test score in the Experiment class was 54,51 and the Control class mean pre-test score was 50,68. After being given treatment, the mean post-test score for the Experiment class increased by 30,2% to 70,97, while in the Control class it increased by 31,5% to 66,65. The results of the t-test analysis showed that (Ha) was accepted with a value of > or 2,007 > 1,306 and sig. 0,048 < 0,05. Thus, there was a significant effect of the Project Based Learning Model on students' writing skills Great Athletes. Keywords: Project Based Learning Model, Writing Skill, Great Athletes
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