The aim is to describe the development of achievement in compulsory school in the Nordic countries from the 1960s. The study relies on published results concerning literacy and numeracy from the international large-scale assessments between 1964 and 2012. Among others, the following conclusions are drawn: (1) for most countries, a small but…

Scores on cognitive tests have been very widely reported to have increased through the decades of the last century, a generational phenomenon termed the "Flynn Effect" since it was most comprehensively documented by James Flynn in the 1980's. There has, however, been very little evidence concerning any continuity of the effect…