1 “... students of different socio-economic status: students in advantaged schools have more opportunities...”

2 “..., such as those that arise from socio-economic disadvantage. In many education systems, the concentration...”

3 “...How do schools compensate for socio-economic disadvantage?...”

4 “... PISA-participating countries and economies in the magnitude of the difference that socio-economic...”

5 “..., especially socio-economically disadvantaged students whose parents had attained only low levels of education...”