Abstract

There are several studies that teach specific content and the English language at the same time using the CLIL approach, but none of them reflect the students' linguistic ability in the given subject throughout the world, especially in Thailand. The Corpus-Based CLIL will be an efficient combination approach that can improve Thai high school students' comprehension of both English and specific content with an emphasis on Economics, as well as their linguistic ability. The purpose of this study is to (1) compare the effects of the Corpus-based CLIL method on the Economics subject and English language learning, and (2) examine how Thai high school students use CLIL and DDL learning processes while dealing with the Corpus-based CLIL method. This study included 40 high school students from the demonstration school. A mixed-methods study was conducted. The students’ reflections, and the teacher's field notes observation were utilized to gather the qualitative data, while the pre-test and post-test were designed to determine the quantitative findings. The study revealed that students using the Corpus-based CLIL method could greatly enhance their understanding of both English and Economics, as well as linguistic features like syntax and collocation in the Economics. Additionally, students could improve their English, Economics, and DDL learning processes. These findings suggest that the Corpus-based CLIL method can effectively improve students' Economics and language abilities simultaneously.

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