It starts with Build 1. There are 6 full lessons linked here. I have given a small description after each link.
Lesson 1 This is about <p>, <em>, <strong>, <hx>, and other tags.
Lesson 2 This is about links, links, and more links. Absolute, relative, and email. Internal anchors and color properties.
Lesson 3 Ah, CSS and Special characters (as seen on this page).
Lesson 4 Images enter. Adjusting sizes. Sounds easy, huh?
Lesson 5 Tables, Thumbnails, Classes, DIVs and SPANS. Getting to be fun!
Lesson 6 Special Formatting. We included the <code> and <pre> tags. Nifty. Learned all kinds of <meta> coding. And of course, the page you are reading. The index.html page.