Great Lakes Kids (social studies) http://www.on.ec.gc.ca/greatlakes/default.asp?lang=En&n=4DB7BBAD-1
More Michigan... http://www.on.ec.gc.ca/greatlakes/For_Kids-WS4DB7BBAD-1_En.htm
Make a snowflake http://snowflakes.barkleyus.com/
Links to great sites for all subjects http://www.ala.org/gwstemplate.cfm?section=greatwebsites&template=/cfapps/gws/default.cfm