Sunday, June 28, 2009

rational numbers

Rational numbers
http://www.uen.org/Lessonplan/preview.cgi?LPid=19826
http://www.k12.wa.us/CurriculumInstruct/Mathematics/background/schielack_teaching_focused.pdf

Monday, June 8, 2009

http://www.fi.uu.nl/rekenweb/en/

http://www.fi.uu.nl/rekenweb/en/ '

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