4California State Board of Education. Mathematics Curriculum Framework of California[S]. Sacramento USA. California Department of Education. 2005.
5California State University Board of Trustees. 1998. Precollegiate Education Policy Implementation: Second Annual Report. Agenda. March 17-18, 1998. 23-31.
6ERIKA STADLER. The Transition between Mathematics Studies at Secondary and Tertiary Levels; Individual and Social Perspectives,Proceedings of CERME 6, January 28th-February 1st 2009, Lyon France INRP 2010 < www. inrp. fr/ editions/cerme6 > , 1655 -1664.