Yeah, it's useless to look at time-series changes in this data without accounting for the fact that, e.g., 29% of students in Germany now have a migration background. A huge chunk of German students are growing up with parents who don't speak German at home, of course that's going to cause test scores to decline.
alt Hacker News
Yeah, it's useless to look at time-series changes in this data without accounting for the fact that, e.g., 29% of students in Germany now have a migration background. A huge chunk of German students are growing up with parents who don't speak German at home, of course that's going to cause test scores to decline.