The document discusses the benefits and challenges of teaching in a virtual classroom using online identities and Web 2.0 tools. It argues that virtual identities can provide more freedom of expression, reduce power differentials, and help form online communities of interest. However, evaluating teaching quality in this environment requires new approaches and adapting to changing media. Overall, virtual classrooms offer opportunities to experiment with identities and roles in learning, but also present challenges in evaluating quality and adapting to new technologies.