OECD. (2016a). Education at a Glance 2016:OECD Indicators, OECD Publishing, Paris, http://dx.doi.org/10.1787/eag-2016-en.
OECD.(2016b). PISA 2015 Results (Volume Ⅱ):Policies and Practices for Successful Schools, OECD Publishing, Paris, http://dx.doi.org/10.1787/9789264267510-en.
OECD.(2016c). Skills Matter:Further Results from the Survey of Adult Skills, OECD Skills Studies, OECD Publishing, Paris, http://dx.doi.org/10.1787/9789264258051-en.
Data and more breakdowns available at http://stats.oecd.org/,Education at a Glance (database).