PISA uses a complex sampling procedure based on stratification variables chosen by the participating countries’ authorities. In this paper we analyse the representativeness of the samples used in terms of the distribution of students per grade and track of studies for Portugal. For the three...

This paper focuses on the territorial distribution of students with an immigrant background enrolled in the 3rd cycle of basic education in Portugal and on the differences in the academic performance of students enrolled in the last year of this cycle based on their birthplace and immigrant...