„16% of the variation in mathematics performance across OECD countries can be explained by differences in the proportions of students who skip school.“
OECD (Hrsg.), „PISA in Focus 35“ (Jänner 2014), S. 2
„16% of the variation in mathematics performance across OECD countries can be explained by differences in the proportions of students who skip school.“
OECD (Hrsg.), „PISA in Focus 35“ (Jänner 2014), S. 2