In schools with a privileged socio-economic intake, disadvantaged students tend to do better than expected (but by a smaller margin compared to other OECD countries) and advantaged students tend to do better than expected (within a similar margin of other OECD countries) (Table 11.5.11 in PISA 2009 Results, Volume II). Most of the students who perform poorly in PISA share a challenging socio-economic background and yet some of Iheir socio-economically disadvantaged peers excel in PISA and beat the odds working against them. These students show that overcoming socio-economic barriers to achievement is possible. While the prevalence of resilience is not the same across educational systems, it is possible to identify substantial numbers of resilient students in practically all OECD countries."