This article compares the US to a whole lot of school systems. There is nothing wrong with that, it’s just possible that if you constantly change the point of c

This article compares the US to a whole lot of school systems. There is nothing wrong with that, it’s just possible that if you constantly change the point of comparison you end up comparing the US to fictional countries – without the reader even noticing. There are huge differences between the school systems in different European countries (and, e.g. in Germany, between the different school systems in different states inside of those countries) that make those kinds of comparisons dangerous.