The US has fallen further behind other countries in math education, according to a major study released today by the Organisation for Economic Co-operation and Development (OECD). Results from the 2012 Programme for International Student Assessment (PISA) show that American 15-year-olds are performing below average in math, ranking 36th out of the 65 countries and economies that participated in the survey, and 26th out of the 34 OECD countries. Performance in these categories remained close to the OECD average, with the report noting no significant change in any category since 2000, when the first PISA was administered. The OECD administers the PISA every three years.