>>Use Text Wrangler (free download) as your text editor for these demos.- software referred to in tutorials is often for windows.
Text Wrangler is better for writing code than text edit  that comes with your Mac.

New to HTML, confused, or need a refresher

• Litte Web Hut Html 5 video tutorials – Parts I-III
• Html.net Html 5 tutorials – up through Lesson 9, images
• W3 schools Html tutorials

CSS

• Little Web Hut CSS video tutorials
• Html.net CSS tutorials
• W3 Schools Html tutorials
  

Bookmark this page for reference > CSS Basics

Advanced
For those of you who really understand CSS (or those who want to explore more!) ,
here are recommended sites to find more tutorials

• W3 Schools (tutorials, examples +)
• CSS Basics
• HTML.net
• Little Web Hut (tutorials +)
• Code Academy

More on my Web Design Links Page