The graph shows the mathematics proficiency of non-immigrant students and of first- and second-generation children of immigrant families at age 15 years. In Spain, the performance of students of first-generation immigrant origin is 55 points below, and that of students of second-generation immigrant origin 34 points below that of non-immigrant students, which is equivalent to being behind by one year of education (the progress recorded in an academic year represents around 40 points in the tests). This gap constitutes a generalised problem in Europe, as even in the Nordic countries, whose education system is considered a model, the differences are even greater.