This research study develops PDEODE-based E-LKPD using wizer.me on chemical equilibrium material, aimed at grade XI SMA/MA students. The goal is to create valid teaching materials, using the Research and Development (R&D) method with the 4-D model. The subjects of this study included 3 students for one-on-one trials, 2 chemistry teachers, and 20 students as respondents in small group trials, na…