Hi everyone. I found a website that is run by a non-profit educational organization called Free World U. It would be a great study aid because it breaks down information very concisely, so it's not hard to comprehend at all. Everything is in flashcard form and it has every subject between grades pre-K-12. It's also completely free; you just have to register, but that's only so the website can remember what you have learned and what you haven't. The homepage explains the way the website works very clearly. I've registered myself to take a look at the flashcards, and they are everything they say they are. It's a great site!

Here is the homepage: www.freeworldu.org

Also, this is the link to a video that explains the program in more detail: http://www.freeworldu.org/videos.htm