Through a sociological approach, this research intends to analyse and better understand the school career of SEGPA students in Reunion Island. Our study mainly focuses on students about to leaving school in 12 different SEGPA. This approach, in terms of process, demonstrates that the personal history and the school career of the students we met cannot be reduced to an individual adventure, but are the result of a comprehensive process whose dynamics are to be found in the combination and interactions of a variety of elements, phenomena and events. Even though the institutional functioning of school guidance influence school destiny, this research shows that school career and the failure of students leaving SEGPA without any qualification are not reducible to the student's personal characteristics or social family context, but is due to a comprehensive process whose interrelated dynamics combine, interact, cumulate and influence each other.