The Drupal Dojo community group dedicated to spreading best-practices and helping developers who are new to the system get up to speed and become masters in their own right. The group was started on http://groups.drupal.org designed to have live lessons on Drupal, which are recorded for viewing anytime. The group is a peer-mentoring group and if you are interested in joining the group, helping out, giving lessons or just chatting with other folks learning Drupal, head on over and check it out.
This section of the handbook is a place to list all of the lesson videos that have been created through the Dojo. They are listed chronologically based on when they were recorded but keep in mind that the videos are not "in order" in the sense of following a series of related videos. Each video is a lesson unto itself, though some lessons do refer to earlier ones.