PISA 2009
From summary of the Pisa study , p. 10: have "systems, high performance and a balanced distribution of returns to education are integrated in the rule, which means that teachers and schools diverse student populations with individually tailored pathways need to include. In contrast, achieving school systems, assume from the outset that the students are intended for different career paths, and accordingly judge the different expectations of them and . Divided into different schools, classes and levels, often less balanced results, without the overall performances were better, "
In short, this means that. Streng tiered school systems such as the Bavarian are no better than others, but clearly unjust