The objective of the present article is to expose and counteract the lack of attention that the institutional apparatus is paying to the dynamics of incorporation, continuity, absenteeism and dropout of the immigrant students in the compulsory secondary education as well as after completion. The deficits of the available information contrast with the data obtained through an investigation conducted in Catalonia, that shows to what extent these situations remain hidden due to the lack of accuracy of the available data, and it also shows how this lack of information prevents us from reflecting on such problems and from taking measures to solve them. The investigation required the analysis of the statistical data facilitated by the Department ...