Over 600,000 students between the ages of eight and nine from 49 countries and territories took part in the 2015 Trends in International Mathematics and Science Study (TIMSS). The highest-scoring students in mathematics hailed from Singapore, Hong Kong, South Korea, Taiwan, and Japan. In particular, the gap between the lowest scoring East Asian country (Japan, at 593) was 23 points higher than the next nation (Northern Ireland, at 570), which was unchanged from 2011. In science, the top scorers were from Singapore, South Korea, Japan, Russia, and Hong Kong.The OECD-sponsored Program for International Student Assessment (PISA) is administered every three years to fifteen-year-old schoolchildren around the world on reading comprehension, mathematics, and science. Students from 71 nations and territories took the PISA tests in 2015. Students with the highest average scores in mathematics came from Singapore, Hong Kong, Macao, Taiwan, and Japan; in science from Singapore, Japan, Estonia, Taiwan, and Finland; and in reading from Singapore, Hong Kong, Canada, Finland, and Ireland.