Although it is not what you call small class teaching, what you can learn in class is definitely not as simple as oral English.
Under my "fool", almost 30 students in our grade have spoken English there, and I really feel that the oral class in Zhuo Ying has changed us.
Be sure to attend Francis's lecture and William's practice class. I have listened to all other people's classes, which is not good.
There are often open classes in Zhuo Ying. You can call them to ask about the open class of Liu Shuang's Oronsis and get a feel for it. 85685660, this is their phone number.
I just think it left a deep impression on me and strongly recommend it.