This research is focusing on developing basic physics teaching materials assisted by PhET simulation. This study aims to produce a product of basic physics teaching materials that contains material, practicum, and practice questions. The research method used research and development method. It is the Borg and Gall model. This study uses the R&D research method which in its reporting uses qualitative and quantitative approaches. The qualitative approach describes the results of the development of teaching materials and a quantitative approach is for presenting data to make it easier to present using numbers. The results of this study are teaching materials that contain material, practicum and exercises. The validation of the study was executed by 3 experts with a validation value of 75%, validation by media experts is 79.19%, and validation by learning experts is 77.08%.