This is a course work on the topic of "Enlarging Function of Foreign Language Teaching and Applying it into Practice" submitted by Rajabova Gulnihol, a student of the 304rd group at the Faculty of Foreign Languages of Kokand State Pedagogical Institute. The work explores various teaching methodologies, theoretical aspects, and effective methods of teaching a foreign language. It also includes a list of used literature and a detailed plan covering topics such as grammar translation method, Total Physical Response, Community Language Learning, and project method.