Rules for Coding XHTML

I made a video (8:41 minutes) that explains four of the most important rules for properly coding XHTML. If you follow these rules, you'll avoid about 90 - 95% of the validation errors that student often make at the beginning of the quarter.

These are the rules (but watch the video to get a better understanding of them):

1. Documents must be well formed.
2. All element and attribute names must be written in lower case letters.
3. Attribute values must always be quoted.
4. Elements must be closed including empty elements.