This document discusses virtual classrooms (VCR) and their key components and uses. It describes a VCR as a simulated online classroom that allows for distance learning. The main components of a VCR are identified as students, a shared learning environment, and functioning tools like a whiteboard, chat, and polling. Common classroom activities that can be done in a VCR are also outlined, such as discussions, teamwork, and resource sharing. Potential benefits of VCRs include cost-effectiveness, global reach, and accessibility. The document concludes by discussing goals of developing VCR technology further.