Free Ajax Online Course

I was recommended by a friend to check out the 10-week online Ajax workshop by Sang Shin. All the content is in the form of slides that can be downloaded from his website. I find it very useful, and comprehensive. He starts off teaching Ajax from scratch, and proceeds to touch upon every aspect of web development that is associated with Ajax. The tutorial includes theory slides, hands-on code, homework, and a certificate that will be issued on successful completion of the course. Thanks to Sang Shin for all his hardwork.