Math and science games. Also has some cool videos as well.
Site is aligned by UK standards but obviously still useable.
Houghton-Mifflin's site. Not promoting their text, defintiely worthwhile.
Hope this stays up, being its on Stetson University. Great logic games!
Mega Math Problems should be the name of this site. Has interactive word problems.
Even though the plastic ones are still needed, this is perfect to save money..