<![CDATA[The low level of students' higher-order thinking skills is related to the need to implement appropriate learning strategies. The PjBL learning model based on the RME approach is present as an alternative in learning because it encourages students to be active, creative, and train thinking skills through completing projects based on real contexts. This study aims to determine the effectiveness of the RME-based PjBL learning model on students' higher-order thinking skills in linear regression topic for class XI. This study uses a quantitative approach with a quasi-experimental type and a pretest posttest non-equivalent control group design. The population in this study were class XI students of MAN 3 Jombang. The sampling technique used purposive sampling with class XI-3 as the experimental class and class XI-2 as the control class. The instruments used in this study were high-order thinking ability tests and observation sheets. Data analysis techniques used descriptive statistics and inferential statistics. The results of the study showed that there was an average difference between the experimental class and the control class with an average score of 44,88 and 36,26. The Independent Samples T-test obtained a significance result of 0,002 < 0,05, indicating that there was a statistically significant difference. Furthermore, the N-Gain test obtained an average increase in the experimental class of 0,1861, higher than the control class of 0,1122. In addition, the result of the effect size calculation of 0,69 is included in the moderate category. Thus, the RME-based PjBL learning model can be used as an effective learning alternative in improving students' higher-order thinking skills in the linear regression topic for class XI.]]>
