The purpose of this study is exploring the meaning and implementation of ‘norm-oriented discourse’ in 2015 National Curriculum of Korean Subject. For this purpose, curriculum documents were analysed, and also in the views of ‘curriculum implementation’, 12 units of textbooks were analyzed and its development process were explored through FIG toward 4 unit writers. The result is as follows : In the curriculum document, norm seems to be main rationals for choosing learning contents or to be as tools for decreasing learning contents. After exploring textbooks and its development context, norm does not be used as the former, and also not be used as the latter. It means that norms have been actually introduced as tools for decreasing learning contents, however, it has been thrown out easily because of loss of considerate deliberation. Therefore, the task for positioning of the norm-oriented discourse in grammar education should be examined in more detailed.