EN
This contribution presents some of the findings of ethnographic-oriented research conducted on activities taking place within the school classroom. The author focuses on activities carried out during class by grammar school students and looks at their strategies and procedures for coping with the rules and demands placed on them daily by the school. These strategies of bypassing, violating and confronting school norms are part of the unofficial 'hidden life', which coexists with the official life at school. The research predominantly consisted of participant observations, which the author undertook via individual and group discussions. On the basis of these results and almost eight-month long observations, the author drew up a classification system of the specific activities taking place during the class and identified three types of strategies - sedating, irritating and preventive - which students used as means of achieving their aims.