<![CDATA[This research was prompted by the inadequate persuasive writing abilities among eighth-grade students in Class E at SMP Negeri 14 Denpasar. The students struggled to determine writing topics, organize the structure of their speeches systematically, integrate facts and data into their arguments, and use effective persuasive sentences. Through the use of a Problem Based Learning (PBL) paradigm focused on environmental issues in the classroom, this study seeks to improve students' persuasive speech writing abilities. 42 eighth-grade students from class VIII E at SMP N 14 Denpasar participated in two cycles of Classroom Action Research (CAR), which was used in the study. Data collection techniques include tests, observations, documentation, and questionnaires. Data is analyzed descriptively using both quantitative and qualitative methods. Qualitative analysis describes the learning process and changes in student behavior as they apply the activities. However, quantitative analysis determines the average scores and the percentage of student learning completeness. The findings demonstrate that implementing a Problem-Based Learning (PBL) model centered on school environmental issues effectively improved students’ persuasive speech writing skills. The students’ mean score increased from 60.33 in Cycle I to 83.14 in Cycle II. The novelty of this study lies in the use of school environmental issues as an authentic context for implementing the PBL model, helping students select topics, develop ideas, and construct persuasive speech texts supported by facts, data, scientific vocabulary, and persuasive sentences.]]>
