HTML
HyperText Markup Language, commonly referred to as HTML, is the standard markup language used to create web pages. Along with CSS, and JavaScript, HTML is a cornerstone technology used to create web pages, as well as to create user interfaces for mobile and web applications. Web browsers can read HTML files and render them into visible or audible web pages. HTML describes the structure of a website semantically along with cues for presentation, making it a markup language, rather than a programming language.[2]
Basic ideas
Programming in HTML Developing and saving Tags, Attributes and Elements Page Titles Paragraphs Headings: The six levels of headings. Lists: How to define ordered and unordered lists. Links: How to makes links to other pages, and elsewhere. Images: Adding something a bit more than tex Tables: How to use tabular data Forms: Text boxes and other user-input
Problem sets
More advanced topics
Good site for choosing HTML colors