Forget about paying for extra math lessons. Thatquiz.org allows you to test your skills in the areas of math that you don’t feel so confident on. The site was originally designed for schools that were not using computers at all; however, it became very popular among high school students that believed that they needed some extra practice. There are over 2 million graded exams, for you to take a look at. You can access all the facilities the site offers without registering and for free. There is no need to have any special software to enter the site. With a browser such as Internet Explorer 6 or Firefox, you are ready to go. You can take the already set up tests, or you can personalize them and make them more accurate for your interests. The site allows you to determine the topic, the length, and the level of the test, among many other aspects. Even thought the site is focused mostly in math, there are also some vocabulary and geography tests to take.