LearningHouse is an organization that specializes in creating and bringing college programs online. Generally they do so using Moodle as the LMS. Thankfully they’ve shared their 50+ Moodle tutorials via Youtube for the curious Moodler to watch and learn from.
As a side note, they recently published an interesting report and infographic about the state of online education in the US (http://www.learninghouse.com/aascu-cic-infographic/).
Check out their video collection with tutorials for navigation, enrollment, conditional activities, differences between 1.x and 2.x, sending messages, using forums and much much more. You can view the complete collection at http://www.youtube.com/user/thelearninghouse/search?query=moodle. Below is a video highlighting Hiding and Showing Sections of a course [direct link: http://www.youtube.com/watch?v=JzDQJ603dWY]