4Programme for International Student Assessment. The PISA 2003 Assessment Framework: Mathematics, Reading, Sci- ence and Problem Solving Knowledge and Skills [EB/OL]. http://www.pisaoecd.org/doeument/29/O,3746,en_32252351_ 32236173_33694301_1_1_1_1,00.html,2011.2013-01-01.
5Programme for International Student Assessment.PISA 2012 Mathematics Framework [EB/OL]. http://www.oecd. org/dataoecd/8/38/46961598.pdf, 2011.2013-01-01.
6MogensNiss.Mathematical Competencies and the Learning of Mathematics: The Danish KOM Project. [ EB/OL ] .http://w3.msi.vxu.se/users/hso/aaa_niss.pdf.2011. 2013-01-01.
7Giovannina Albano. Knowledge, Skills, Competen- cies: A Model for Mathematics E-Learning [ EB/OL ]. http : //www.springerlink.com/index/R55115M0377P03K5.pdf, 2011.2013-01-01.