One of the things that is so incredibly exciting about a CBT Nuggets subscription is all of the content that is constantly in production. Many of these titles require work outside of the virtual classroom, so it makes perfect sense to watch a video or two each week as they are produced, and then be practicing and doing the out of class work as you go.
A perfect example of a class that would require this type of approach is our Cisco CCIE RS v5 All-In-One: 3.0 Layer 3 Technologies course. This is just one of the many courses that are currently in progress. Check them all out here!