other virtual filing cabinets:
Sam J Shah’s VFC
Mr Kraft’s VFC
Resourceaholic and her PRET homeworks
Take it to the limit VFC
KFouss’s VFC
Some good things here from the Grand Valley High School Wiki. Favorite Teaching Resources provides some other good links too.
Search Engines:
Robert Kaplinksy’s problem based learning search engine
The MTBoS search engine
Some of my other favourite websites:
Rich starting points (RISPs) with a statistical version too which you can get to through the main site.
Don Stewart’s Median blog
Kangaroo Maths has lots of free stuff
Harris Maths 