<![CDATA[This research aims to determine the increase in students' high-level thinking abilities and increase students' mathematical resilience abilities by implementing project-based learning and to determine the effectiveness of the project-based learning model for high-level thinking (HOTS) and the resilience abilities of class XI students at the Development Private High School in Galang. The method used in the research is quantitative research. The location of the research was at the Galang Development Private High School, Jl. Neighborhood Farmers VII Galang City, Galang District, Deli Serdang Regency. The research was conducted in class XI in the even semester 2023-2024. The research subject is class XI, where class XI-1 is an experimental class with a project-based learning model and class XI-2 is a control class with a direct (conventional) learning model. The achievement and improvement of high-level thinking skills of students who receive project-based learning is better than students who receive direct learning. And the achievement and increase in mathematical resilience of students who receive project-based learning is better than students who receive direct learning]]>
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