Every three years, when PISA results are published, the world’s media focuses on countries’ rankings in mathematics, reading and science performance. Often, what is lost in the subsequent national-level soulsearching about how to improve student performance is the fact that many countries have raised their game significantly since the first PISA test was conducted in 2000. In fact, half of the countries and economies that have participated in at least three PISA cycles have improved significantly in reading performance since 2000, a third have improved in mathematics performance since 2003, and almost a third have improved in science performance since 2006.
