ABSTRACT
The application of STEM-PBL in the world of education is inseparable from the times. This study aims to determine the effect of using STEM-PBL in chemistry subjects, especially chemical equilibrium materials. The samples were students of SMAN class XI, which consisted of one experimental class and one control class. This study uses a moderator variable, namely the initial ability of students. The study used a covariate test (two-way ANOVA). The results of the hypothesis test state that the experimental class has a significance of 0.000, which means that there are differences in students' conceptual understanding in the experimental class and the control class.
