The current revision of the national curriculum includes the goal to grow students to be autonomous and creative agents who can take part in society as global citizens, and it still puts an importance on educating various cultures in EFL class. With the advance in technology and ease of access to various media, students have become more exposed to media, and even teachers have had more chances employing those as good teaching materials in their class. However, in spite of these changes, education in school still focuses on conveying knowledge of no matter what they use as material in class, and students accept and take it for granted. This way of teaching impedes to grow students as critical thinkers who can analyze the contents and, further, recognize the biased perspective or injustice in the media. However, it is also true that there are not many specific provisions for teachers to apply into their classes which have been provided by the national curriculum. Therefore, this study tries to shed light on developing students' critical thinking using media in class. In this research, three classes are introduced, and each class is implemented with a different medium: drama series video-clip, a young-adult novel, and advertisements applying critical thinking practices. Since students were allowed to choose the language they wanted to use during the class, and answers from students' various perspectives were admitted, they seemed to more actively participate in discussions. Although there are still some challenges in applying critical thinking practices in regular class hours, this paper introduces several ways that teacher can employ to help their students think critically, find the posed-problems in media or the contents they deal with in their real world, and seek the ways they can act on them.