Alive communities, whether planned or spontaneous, have a "coordinator" who organizes events and connects community. But others in the community also take on leadership roles. We commonly see three main levels of community participation. The first is a small core group of people who actively participate in discussions, even debates, in the public community forum. They often take on community projects, identify topics for the community to address, and move the community along its learning agenda. This group is the heart of the community. As the community matures, this core group takes on much of the community's leadership, its members becoming auxiliaries to the community coordinator. But this group is usually rather small, only 10 to 15 percent of the whole community. At the next level outside this core is the active group. These members attend meetings regularly and participate occasionally in the community forums, but without the regularity or intensity of the core group. The active group is also quite small, another 15 to 20 percent of the community.
A large portion of community members are peripheral and rarely participate. Instead, they keep to the sidelines, watching the interaction of the core and active members. Some remain peripheral because they feel that their observations are not appropriate for the whole or carry no authority. Others do not have the time to contribute more actively. In a traditional meeting or team we would discourage such half-hearted involvement, but these peripheral activities are an essential dimension of communities of practice. Indeed, the people on the sidelines often are not as passive as they seem. Like people sitting at a cafe watching the activity on the street, they gain their own insights from the discussions and put them to good use. They may have private conversations about the issues being discussed in the public forum. In their own way, they are learning a lot. In one community, a peripheral member attended nearly all meetings for two years, but almost never contributed. Then he was transferred to another division and, to everyone's surprise, started a similar community there.
Unlike team members, community members can offer advice on a project with no risk of getting entangled in it…
—Cultivating Communities of Practice
Finally, outside these three main levels are people surrounding the community who are not members but who have an interest in the community, including customers, suppliers, and "intellectual neighbors."
Community members move through these levels. 8 Core members often join the sideline as the topic of the community shifts. Active members may be deeply engaged for a month or two, then disengage. Peripheral members drift into the center as their interests are stirred. Because the boundaries of a community are fluid, even those outside the community can become quite involved for a time, as the focus of the community shifts to their areas of interest and expertise. The key to good community participation and a healthy degree of movement between levels is to design community activities that allow participants at all levels to feel like full members. Rather than force participation, successful communities "build benches" for those on the sidelines. They make opportunities for semiprivate interaction, whether through private discussion rooms on the community's Web site, at a community event, or in a one-on-one conversation. This keeps the peripheral members connected. At the same time, communities create opportunities for active members to take limited leadership roles, such as leading a development project that requires a minimal time commitment. To draw members into more active participation, successful communities build a fire in the center of the community that will draw people to its heat.
