Jim and Cathy Mellon are two of the mature, godly leaders in the house church movement. They started their first house church 18 years ago and helped found House2House Ministries about 10 years ago. http://www.site.house2house.com/
In the Apprenticeship, Jim has teamed up in a CO2 (church of two) with Wade Adams. The Lord moved Wade into the house church world in the last couple of years after 19 years as a pastor in traditional churches. So, these two men are mature, experienced Christian leaders.
The Apprenticeship can best be described as a small "community of practice" that creates a powerful learning environment. Several components come together to create this community. In the video below, Jim and Wade reflect on the first two components: weekly learning assignments and a Facebook discussion group.