Here's a start

I've told you about this resource before, but here's the direct link: khanacademy.org.  It's a site with loads of video tutorials on a variety of subjects.  It has math practice as well.  It's a great place to practice the basics.

quizlet.com is a flashcard building site.  You can create your own flashcard sets, browse other people's (and there are tons), and play very simple games with those sets.

Enjoy.