In an attempt to uncover differences in student behavior as a function of class size, the author observed a small class and a large class for 15 hours each and conducted interviews with eight students who were members of both classes. Two trends emerged from these qualitative data. First, a "diverge-converge" pattern was evident in the small class (absent from the large class) in which students were much more able to get back on task after becoming off-task or off-topic. Second, the atmosphere in the smaller class was more relaxed and had a very conversational tone. (Contains 1 note.)