TheĀ Opera Web Standards Curriculum has been adopted as the official W3C Web Standards Curriculum. Whether you’re a teacher, student, or just filling holes in your knowledge-base, this free content has a lot of good information there.
What follows is a list of all the articles within the web standards curriculum, which will give you an essential grounding in HTML5, CSS, JavaScript, accessibility, and the other topics you need to be a modern web developer/designer. Reading them in order makes the most sense, but they are written to work individually, so you can dip in and out as it suits you, if you need to hone individual skills. Web Standards Curriculum