Abstract
This research studies the texts of debate of President and Vice President candidate of Republic of Indonesia in 2014-2019 period by using the theory of Systemic Functional Linguistics (SFL) which is related with discourse analysis subject learning at school. This research deals with three metafunctions of languages such as: exposure, exchange and experience relation. This research is focused on the function realized in the exchange rate system and the modalities of the value message in the context of ideology, culture, and situations that found and dominates in the debate's texts of President and Vice President candidate of Republic of Indonesia in 2014-2019 period. After collecting the data, then describing the values behind the dominant frequency in the modalities that realized in the context of ideology, cultural context and the context of the situation. The result of data analysis shows that modality found in the debate text of JW -JK is more than PS -HR. This is based on the text modality analysis. The result of this research can be related to discourse subject learning in school in terms of analyzing discourse or text by using SFL theory.