HippoCampus.org

If you need a little refresher about a topic before you have to teach it, check out this site. http://www.hippocampus.org/ I've also added on a link on the right side of this page, so that if people start adding more posts, you'll be able to find it quickly still.
They have tutorials for algebra and "elementary algebra". They also have some history, biology, government, and physics (for next year).

Worksheet Generator

If you'd like a website that you can use to create your own worksheets with a few clicks, here's one: www.mytestbook.com . There are some for science and reading, too. You can select from grades 1-5 at the top of the screen. There are even some algebra and geometry worksheets! Answers can be shown with one more click and then you can print an answer key. This would be a great way to create some folder work for students who are missing lower level skills, too. You do need to sign up, but it's free. There are also tests that your students can take right on the computer, if you have access to a lab.