This report presents the first internationally comparable results to OECD's 2003 Programme for International Student Assessment (PISA) Survey of the educational performance of 15-year-olds in reading, mathematics, and science in 25 OECD countries.  This year, the concentration was on mathematics. Beyond the examination of the relative standing of countries in mathematics, science and reading, the report also looks at a wider range of educational outcomes that include students’ motivation to learn, their beliefs about themselves, and their learning strategies. Furthermore, it examines how performance varies between the genders and between socio-economic groups; and it provides insights into some of the factors that influence the development of knowledge and skills at home and at school, how these factors interact and what the implications are for policy development.  Most importantly, the report sheds light on countries that succeed in achieving high performance standards while, at the same time, providing an equitable distribution of learning opportunities. The report presents a wealth of indicators showing how countries compare in various measures of educational performance and factors that affect that performance.