The document summarizes a study on why teachers want to participate in self-generated online communities. The researchers interviewed 23 teachers who were members of 3 online communities. The study found 5 main reasons teachers participate: 1) to share emotions about their experiences, 2) to gain advantages from collaboration, 3) to combat isolation, 4) to explore ideas with other teachers, and 5) to experience a sense of camaraderie. Overall, the study suggests that online communities provide emotional and professional support for teachers that contributes to their identity and confidence as educators.