Join Joe Chellman for an in-depth discussion in this video Exercise files, part of jQuery Data with AJAX.
If you're a premium member of lynda.com, you have access to the exercise files for this course. I've downloaded them here to my desktop. So as you can see, each of these folders maps on to a chapter in the course. For example, 0102 is chapter one, movie two. For examples where the files change between the beginning and the end of the course. We have start and end folders. So there are the numbered ones, and then if you shared folders that are used in several examples to save space. If you are not a premium member of lynda.com, you could still follow along with the lessons.
You just might need to type some things out for yourself.
This course is a short companion piece to jQuery for Web Designers. See that course for information about building your core jQuery skill set.