Websites to help you learn HTML

w3schools.com has an excellent site with tutorials that let you see what you are doing step-by-step.
http://www.w3schools.com/Html/html_examples.asp 

tizag.com has another nice tutorial to help you get started or to use as reference tool.
http://www.tizag.com/

echoecho.com also has a good tutorial
http://echoecho.com/html.htm