It's all about selection bias. This particular person went to a foreign school that probably selected for a certain type of student just by being there. Here i

It's all about selection bias. This particular person went to a foreign school that probably selected for a certain type of student just by being there. Here in the US, I actually worked as a teacher before changing careers. Most of the students were good, could learn and wanted to learn. The lack of any real authority to discipline the 5% problem kids or the resources to deal with the xyz% ADD kids is what brings the whole class down. You end up teaching to the bottom and simply assigning busy work to the rest. So I'm not surprised that a small school with certain location bias might be lucky enough to escape a full normal distribution of an American classroom.