Take a walk through the woods and learn about all things HTML5. Starting with the JS APIS (selector API, storage, appcache, web workers, web sockets, notifications, drag and drop, and geolocation).
Then delve into the new HTML semantic tags, link relations, micro data, ARIA, forms, audio and video, Canvas, and WebGL.
Finally, the holy trinity finishes with CSS and selectors, fonts, text, columns, stroking, opacity, HSL, rounded corners, gradients, shadows, backgrounds, transitions, transforms, and animations.
The Object Oriented Programming Web publishes FREE programming and computer science tutorials, lecture notes, course slides and e-books. OOPWeb.com is a great resource for all programmers and computer science students, but it's especially popular among those who are interested in C++, Java and Object Oriented Programming.
This website provides tutorials and sample course content so CS students and educators can learn more about current computing technologies and paradigms. In particular, this content is Creative Commons licensed which makes it easy for CS educators to use in their own classes.
The Courses section contains tutorials, lecture slides, and problem sets for a variety of topic areas:
AJAX Programming
Algorithms
Distributed Systems
Web Security
Languages
In the Tools 101 section, you will find a set of introductions to some common tools used in Computer Science such as version control systems and databases.
Matt Nowack has taken the awesome HTML5 presentation app in HTML5, which is open source, and has created a presentation discussing jQuery 1.4.
It is good stuff, using the fact that you can embed the features that you want to show. Just as long as you can hit the right arrow to get through the "look at all the people who use jQuery" part (we get it! lots of people use jQuery!)