Yet Singapore does much better than Thailand. Thai students achieve some of the lowest scores in East Asia in the Programme for International Assessment (PISA) test, an international study which evaluates students worldwide. The average score among OECD countries is normalized to 500 points and the standard deviation to 100 points. The average 15-year-old in Singapore scores 526 in reading, 562 in mathematics and 542 in science, far above the OECD average. By contrast, their Thai counterparts achieve only 421, 419 and 425, respectively.