Students can learn useful expressions / vocabulary words and check tips to have high scores through answering a. The textbooks we use are basic and intermediate level textbooks, as well as practical test textbooks. In addition, you can prepare for the OPIc test since a teacher gives you corrections of the wrong sentences in grammar you said that are difficult to grasp by self-study. This course is for students who have intermediate level of English or above. You can check the detail of textbooks on textbook page.