Opera launches web developement tutorials website, Opera’s new Web Standards Curriculum, released in association with the Yahoo! Developer Network, is a complete course to teach you standards-based web development, including HTML, CSS, design principles and background theory, and JavaScript basics. It already has support from many organizations (including Yahoo! and the Web Standards Project) and universities.

There’re many great articles such as what does a good web page need?, the web standards model—HTML, CSS and JavaScript, introduction to ihe web standards curriculum and more… you can read on their site

Link : Opera Web Standards Curriculum