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There are some techniques in teaching grammar in order to catch students’ understanding. (Yin Wong, 2012) states that the idea of Communicative Language Teaching (CLT) has been expanded since the mid-1970s. Communicative Language Teaching (CLT) in believed one of the best teaching approaches in teaching simple past tense and passive voice. This research is done through having some questions like; what are the teachers’ perceptions about teaching grammar using CLT for the senior high schools and how is the implementation of teaching grammar using CLT in the classroom using CLT. This research design used the qualitative descriptive with the two sampling they were SMU Negeri 6 Semarang and SMU Institute Indonesia. The subject of the research was the first grade students who have the material involve in the syllabus. The result of the research are; First, the teachers’ perceptions can be elaborated like; they believe that grammar teaching is necessary for students, and believe that CLT should include both speaking and writing. They support the notion of engaging students in communication, but feel that teaching grammar is necessary, because students need grammar to communicate, etc. Second, Teachers implement grammar instruction in their CLT classroom using some procedures there are; completing the administrative matters, like lesson plan, current material, PowerPoint slides, paper of exercises, video/movie, and circle teaching techniques. The recommendations are to implement the communicative language teaching/CLT teachers should be active to speak up in elaborating the material and giving the formulas as well as the examples, to make students follow the lesson, teachers should make the teaching and learning activity more interesting by giving the proper media, in which absorb the students’ attention before entering the real grammar taught. Communicative language teaching/CLT cannot be implemented at all schools like, e.g. vocational high schools, since there is no a research draws that point.
Keywords: profile, teaching grammar, communicative language teaching