The Cocoaer learning model was developed to prevent the emergence of Misconception Potential (FMD) of high school students (SMA). This study aims to develop a valid, practical cocoaer learning model to prevent the emergence of high school students' PMK. Development of a cocoaer learning model based on needs analysis. R and D development research (Research and Development) refers to the Borg & Gall's (1997) model, namely the development of models carried out through repetitive activities from starting to design to limited test models. The data was analyzed descriptively. The results of the study show that: (1) the cocoaer model and the supporting model are classified as valid and reliable, (2) the syntax implementation of the model and the observations of student activities in accordance with the design of the cocoaer model.