In preparing for my teaching practice and final demonstration, I adapted my lesson plans to align with the format used at Anuban Udon Thani School in Thailand. The school follows the Basic Education Core Curriculum B.E. 2551 (A.D. 2008) and caters to students from kindergarten to grade 6. At the elementary level, the school offers regular, Smith, and intensive programs, with Smith focusing on mathematics and science, and the intensive program (IP) emphasizing English, Science, and Mathematics. During that time, I got the chance to teach a regular class where I used a combination of English and Thai for instruction. As English is not the first language for the students, the teaching and learning process mostly utilized Thai as the medium of instruction. This is a common practice in Anuban Udon Thani school, where the use of English as a medium of instruction varies depending on the program. For instance in English subjects in intensive programs, English will be the primary medium of instruction for subjects and English language itself. The flexibility in the use of language as a medium of instruction in Thailand reflects the cultural and educational diversity in the country