The Program for International Student Assessmet (PISA) Math scores from 2012 were released in December 2013, ranking students from Asian countries at the top of the list, with Finland being the sole non-Asian country included in the list of top performers in science.
The top performers in math: China, Singapore, Hong Kong, Taiwan, South Korea
The top performers in reading: China, Hong Kong, Singapore, Japan, South Korea
The top performers in science: China, Hong Kong, Singapore, Japan, and Finland
(Source PISA 2012)
They and their school principals also answer questionnaires to provide information about the students' backgrounds, schools and learning experiences and about the broader school system and learning environment.