mathworldhttp://mathworld.wolfram.com/
catalyst http://www.abc.net.au/catalyst
sudoku.orghttp://www.sudoku.org.uk/
maths problems!http://www.mat.itu.edu.tr/gungor/IMO/www.kalva.demon.co.uk
australian science communicatorshttp://www.asc.asn.au
you can do mathshttp://youcandomaths.com.au
australian association of maths teachershttp://www.aamt.edu.au/
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