There are on-going debates on the implementation of the 7th national curriculum among teachers. For the successful implementation of new curriculum in school settings, we need many things including new teaching materials, new teaching methods, new classroom settings, etc. Among them, most of all, the professional ability of teachers become the crucial factor for the curriculum implementation. The professional ability of teachers must be understood as a reflective practice which is concerned with making meaning with students in the classroom, rather than technical ability to transmit knowledge and informations from texts to students. In order to develop this lund of professionalism in teachers, we need to give them more autonomy and flexibility in curriculum making process, and more reliance on teachers' professional ability.