NOTE: The PISA mathematics framework was revised in 2003. Because of changes in the framework, it is not possible to compare mathematics learning outcomes from PISA 2000 with those from PISA 2003 and 2006.
SOURCE: Organization for Economic Cooperation and Development (OECD). (2004). Learning for Tomorrow's World: First Results From PISA 2003, table 2.5c. Paris: Author; OECD. (2007). PISA 2006: Science Competencies for Tomorrow's World, Volume 2: Data, table 6.2c. Paris: Author.