The classroom is unusual in being a closed social setting with clear physical and social boundaries. Not as closed as a prison or psychiatric ward, but is less open than many other settings, like leisure centres or shops:
-It is a highly controlled setting - for example, the teacher and the school control classroom layout and access, as well as pupils' time, activities, noise levels, dress and language while they are in the classroom.
-Young people rarely experience this level of surveillance and control in other areas of their lives.
-Due to this, the classroom behaviour that the researcher observes may not accurately reflect what those involved really think and feel.
-In classroom interactions, teachers and pupils are very experienced at concealing their real thoughts and feelings from each other - another example of impression management - and they may conceal them from the researcher too.
-As the classroom is a fairly small, confined social space with room for perhaps 30 or so people, they are also comparatively simple social settings: in most cases, there are just 2 social roles in the classroom - teacher and pupil. All this makes classroom interaction relatively straightforward to observe and analyse.