I was looking at the Technology Tidbits blog and he featured a link to a math game site, BoomBlocks. It is a really nice math game that would probably be fun for most kids. It works like most video games, with students trying to solve the equations as quickly as possible. They get power-ups and other rewards for answering correctly. They can level up in the game to more difficult levels with more problems. Check out the blog here.
But then I went back in the site to the home site and found even more resources. While I don't think games on the internet will solve a child's learning difficulties it is a nice, fun way for kids to practice and reinforce skills. They will work longer if they are having fun! Here is the main site for the BoomBlocks game.