This study aims to determine the quality of E-LKPD on Narcotics, Psychotropics, and Addictive Substances. To achieve these objectives, this study used a descriptive research design with a quantitative approach. This research was conducted at the Biology Education study program, FKIP University of Riau in August 2021 – June 2022. The type of research used was the ADDIE Research and Developm…