HTML Goodies: www.htmlgoodies.com Try the tutorial "If you know nothing about HTML, this is where you start." Find it under "Primers" then select "HTML")
W3 Schools: www.w3schools.com. Go to "Learn HTML"
Web Developers Virtual Library: www.wdvl.com. Look for the Tutorial called "Introduction to HTML"
World Wide Web Consortium (W3C): www.w3.org. W3C is the international standards body for the web. Go to HTML (in the "W3C A to Z" menu) then choose "Tutorial" and find "Getting started with HTML" by Dave Raggett
W3 Schools: www.w3schools.com. Has a huge range of tutorials and references for all web technologies. Try the HTML "Quick Starter". Also the "references" section has complete lists of HTML tags.
Web Design Group: www.htmlhelp.com. In the "Design Elements" section, take a look at the article "Image use on the web" for more information about choosing GIF or JPG formats for your website.
Webmonkey: webmonkey.wired.com Long-running resource dedicated to learning about the web with many resources for starting out in HTML.
World Wide Web Consortium (W3C): www.w3.org. W3C is the international standards body for the web.
Musciano, C. & Kennedy B. 2002. HTML & XHTML: The definitive guide 5th edn, O’Reilly & Associates, USA.