id	domain	url
ger-304	www.corestandards.org	http://www.corestandards.org
ger-304	www.giftedchildren.org.nz	www.giftedchildren.org.nz/apex
ger-304	nrich.maths.org	http://nrich.maths.org/frontpage
ger-304	www.mathgifted.org	http://www.mathgifted.org/publications/d3.6.pdf
ger-304	scholarworks.umt.edu	http://scholarworks.umt.edu/tme/vol8/iss1/9
ger-304	www.pisa.oecd.org	http://www.pisa.oecd.org/dataoecd/45/32/3369399
ger-304	nrich.maths.org	http://nrich.maths.org/public/viewer.php?obj_id=5
ger-304	www.mathgifted.org	http://www.mathgifted.org/publications/d3.6.pdf
ger-304	www.pisa.oecd.org	http://www.pisa.oecd.org/dataoecd/45/32/33693997.pdf
ger-304	www.pisa.oecd.org	http://www.pisa.oecd.org/dataoecd/45/32/33693997.pdf
ger-304	nrich.maths.org	http://nrich.maths.org/public/viewer.php?obj_id=5662
ger-304	nrich.maths.org	http://nrich.maths.org/public/viewer.php?obj_id=5662
ger-304	www.mste.uiuc.edu	http://www.mste.uiuc.edu/users/aki/open_ended