Lynda.com is an amazing instructional, educational website. We have contracted with Lynda to serve up instructional videos that our internal staff and administrators use on a regular basis. We use it for enhancing our workforce's skill sets.
In my opinion, it is one of the best instructional education websites. If a user enrolls in a course, he/she can complete it at his own pace, while bookmarking important content as well. Overall it's been a good purchase for us.