5Curriculum Planning and Development Division. Pri- mary Mathematics Teaching and Learning Syllabus. [EB/OL]. (2012-04-29) [- 2013-6-16 ]. http. // www. moe. gov. sg/education/syllabuses/sciences/ files/maths-primary-2013, pdf.
6Lianghuo Fan, Yan Zhu. Representation of Problem-sol- vin4~ Procedures.. A Comparative Look at China, Sin- gapore, and US Mathematics Textbook [-J~. Educa- tional Studies in Mathematics, 2007 (66) : 61-75.
9Nohara,D.A Comparison of the National Assessment of Educational Progress(NAEP). the Third Internationa) Mathematics and Science Study Repeat (TIMSS-R) ,and the Programme for International Student Assessment (PISA)[].NECS Working Paper No.2001
10Schmidt, W. H.,McKnight, C. C.,Valverde, G. A.,Houang, R. T,& Wiley,D. E.Many Visions,Many Aims:A Cross-National Investigation of Curricular Intentions in School Mathematics[]..1997