You guys are all fools. Read w3fools.com. This website is complete and utter garbage, it gives false information, has had many requests from w3 themselves, to change their site name, and they refuse to do so. They also refuse to update their information. Not only that, but the certificates, will not be regarded as valuable to employers who want a real designer. This site should be removed, forever.
Demosthenes.info (my web design instructors page, his brain is made of code, i swear, he hates, to the core, w3schools).