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This study aims to develop LKS assisted media simulation with Modellus on kinematics learning. The experimental subjects in this study are high school students of class X. The model used is the ADDIE development model which includes 5 stages of Analysis, Design, Development, Implementation, and Evaluation. To know the feasibility of the media validation. Validation is in the form of a questionnaire with predetermined criteria and indicators. Of the total number of reviewers' feasibility in terms of content, presentation, language and technical requirements, Modellus simulated media-assisted LKS received a mean score of 73.25%, and user test with a percentage of 75%. With that percentage, the simulated media student worksheet with modellus is categorized as a learning medium