http://www.learnalberta.ca/content/me5l/html/Math5.html
From our friends to the North, Alberta, Cananda’s Education department created some slick mathematics resources targeting upper elementary age math skills. If you’re interested, the Alberta Ed site can also be found at http://www.learnalberta.ca/Home.aspx?lang=en
(It appears you have to request guest access, since some of their resources are licensed for Canadian teachers only…, http://www.learnalberta.ca/UsingThisSite.aspx?HelpItem=HelpTeachersOutside&lang=en )