Pancasila Education at SMAN 2 Lamongan, the lecture method is still theoretical. This causes students' learning interest to be low. This condition causes the learning process to feel monotonous, causes boredom, and decreases active student participation. This study aims to examine the effect of implementing the Window Shopping method on students' learning interest in the Pancasila Education subject in class XI of SMAN 2 Lamongan. This study uses a quantitative approach with a quasi-experimental type and a nonequivalent control group design. The research sample consisted of 70 students consisting of 35 students in the experimental class (XI-10) and 35 students in the control class (XI-12). Data collection techniques were carried out through questionnaires, and data analysis used descriptive analysis and inferential statistics. The results of the study showed that the average score of students' learning interest in the experimental class was higher than in the control class. This was proven through the nonparametric Mann-Whitney U test which showed the Asymp. Sig. value. (2-tailed) of 0.000 which is smaller than the significance level of 0.05, so H₀ is rejected and Hₐ is accepted. In addition, the results of the N-Gain analysis show an average score of 0.7013 or 70.13% which is included in the fairly effective criteria. This value indicates that there is a significant increase in student learning interest after the application of the Window Shopping method. Thus, it can be concluded that the Window Shopping method is effective in increasing learning interest because it is able to encourage active involvement, interaction, and a more interesting learning experience.