The aim of this qualitative research was to describe forms of student nonconformity at school and how these were codified. An analysis of 61 student teachers' narratives about their own school attendance gave us some insight into their childhoods. Based on this analysis, we describe the normative worlds of the family and peer collective that can reinforce or weaken student nonconformity at school. The paper then focuses on norms specific to schools and how they are codified. These determine the forms of student nonconformity, which are divided according to five criteria: type of social norm, number of actors, sanctions, students' perception of the nonconformity, and location. This study describes learning outside formal curricula at school as well as students' perspectives and their active role in this process.