Such articles are always misleading. There are three kinds of lies: lies, damned lies, and statistics. - Mark Twain If you are interested in such questions

Such articles are always misleading. There are three kinds of lies: lies, damned lies, and statistics. - Mark Twain If you are interested in such questions just read the original research: PISA 2003 http://is.gd/Si0 http://is.gd/Si0 Full report in English: http://www.pisa.oecd.org/dataoecd/1/60/34002216.pdf http://www.pisa.oecd.org/dataoecd/1/60/34002216.pdf