How do education systems around the world compare? Several studies aim to highlight where countries are doing well – and where they are not. This year, in the biggest release of comparative education data in history, two influential large-scale studies will be publishing their results. At the end of November, the Trends in International Mathematics and Science Study (Timss), will reveal its assessment of the maths and science achievement for children in Year 5 (aged 9 to 10) and Year 9 (aged 13 to 14). Then at the beginning of December, the Programme for International Student Assessment (Pisa) will show how well 15-year-olds are doing in maths, reading and science. Here we’ve pulled together all the latest news, views, and statistics you'll need to help you make sense of the results and how they will influence education.