I'm truly not trying to plug my website and I'm not making any $ off of these links (given that they are free), but I do have a bunch of free educational site links here: http://www.galileoeducation.org/links.html It seems more expedient to just give you the whole list this way than to post them one by one!

I do have the funbrain math arcade in there, but you might want to try funbrain's main page which has some other games as well: http://www.funbrain.com/