<![CDATA[This research was aimed to analyze the effect of problem based learning model on ecological literacy of high school students. This study is a type of quasi-experimental research with a pretest-posttest control group design model. This study used two sample groups, namely the experimental group and the control group. The study was conducted at SMAN 1 Ngadirojo. The number of research subjects in each class was 35 students. The experimental group subjects were class XI IPS 1 and the control group subjects were class IPS 2. Data collection was carried out using test instruments and questionnaires through pre-test and post-test. Data analysis was carried out using independent t-test analysis techniques on the N-Gain Score value with a significance level of 0.05 through the SPSS 126 application. The results showed that the problem based learning model had a significant effect on students' ecological literacy with a significance value of 0.013 (significance value <0.05). These findings indicate that the problem-based learning model in geography learning has an effect on the ecological literacy skills of high school students.]]>
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