http://www.funbrain.com/brain/MathBrain/MathBrain.html
http://www.learnenglish.org.uk/games/magic-gopher-central.swf
http://www.mrnussbaum.com/placevaluepirates.htm
Math sites:
http://www.digicc.com/fido/
http://www.bigbrainz.com/index.php
http://www.globalspec.com/trebuchet/
http://pbskids.org/cyberchase/