English language is one of international language that is required to build the communication and interaction in their daily life. Thus, in this modern era, it is required not only in social interaction and communication but also in mastering and understanding english well, especially in formal and non-formal education by emphasizing in english grammar and speaking mastery. Grammar learning has important role in english mastery, because without grammar make the meaning of the sentences ambiguous, then it could make misunderstanding to communicate each other. Grammar managed words and sentences, in order to understand and implemented by students, so it is required the strategy, especially in grammar learning strategy. One of that strategy is interactive learning. Interactive learning is model of two-way communication that allow the students interact with teachers, classmates, and environment.  Thus, the purpose of this study is to know how the strategy of interactive learning in grammar subject IDIA Prenduan. The method of this research is qualitative, descriptive study. The data sources used are primary data and secondary data with data collection procedures through interview, observation and documentation. The result of this research show that the strategy of interactive learning in Grammar Subject are, class grouping based on potency level and student’s skill, build two-way communication and formulated the unique-easy understandable topics, but there are obstacles that faced by teachers as follows: first lack of English mastery, especially in grammar, second limited time duration, third Inadequate facilities.