In this January 2013 photo, preparatory students sit for National Center Test for University Admissions at the University of Tokyo. Students from Shanghai, Hong Kong, Singapore, Taiwan, Japan and ... more 
In this January 2013 photo, preparatory students sit for National Center Test for University Admissions at the University of Tokyo. Students from Shanghai, Hong Kong, Singapore, Taiwan, Japan and South Korea were among the highest-ranking groups in math, science and reading in test results released Tuesday, Dec. 3, 2013 by the Program for International Student Assessment (PISA) coordinated by the Paris-based Organization for Economic Cooperation and Development (OECD). The group tests students worldwide every three years. In Japan, the government added 1,200 pages to elementary school textbooks after its children fell behind in those in rivals such as South Korea and Hong Kong in 2009, although Japan’s scores for 2009 were tops for rich industrialized countries. Japan has since improved its standings in all three areas. (AP Photo/Kyodo News) JAPAN OUT, CREDIT MANDATORY less 
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Associated Press | Photo By Kyodo News
Wed, Dec 4, 2013 8:21 AM EST