W3 Schools

W3Schools is a very useful resource for teaching yourself web development languages. It serves as a learning resource as well as a coding reference. Through it, you can learn HTML, CSS, JavaScript, jQuery, SQL, or PHP. With each language, you can open up a scripting reference to use when writing your code, or you can take a look at their tutorials. The tutorials are relatively basic, but  the reference is where the website is most useful.

 

Along with some code example for the references, there is a "Try it Yourself" editor for both the tutorials and the references. For example, in the DIV reference for HTML, the website supplies a code example as well as a "Try it Yourself" area for experimentation. This is very useful because it allows the user to experiment with the code and learn how it works through experimentation.

 

Overall, W3Schools is a very useful tool for teaching yourself web development, as well as a good script reference for those who need a refresher.