This study was designed to explore effective techniques to be used in IERW (Integrated English Reading and Writing) classes for college students. The study last for 15 weeks and included 457 students and 11 instructors at E University. The participants were freshmen who were taking a compulsory English reading and writing class, and the instructors were seven native English speakers and four Koreans. To ensure the effectiveness of IERW classes, it is important to identify what teaching activities are being used and which activities students prefer. To address these issues, the instructors were interviewed regarding their teaching activities in IERW classes. From the interview results, a survey was made that asked students which class activities they consider useful. The results show that most students responded positively to the activities that the instructors were using, with a preference of around 70 percent. Notably, pair or group activities were rated as less favorable than other activities, with a score of under 50 percent. Some implications of the findings and suggestions for teaching activities for IERW classes are provided.