across oecd countries a more socioeconomically advantaged student scores points higher in mathematics the equivalent of nearly one year of schooling than a iessadvantagpd student in portugal the performance difference in mathematics is is scorepoints together with chile hungary luxembourg and the slovak republic the relationship in portugal between performance and socioeconomic status is significantly above the oecd average oecd a portugal s position contrasts to that of italy which for example showed a similar performance level and improvement in pisa results as with portugal between and see figure