text: If a student were to miss their bus and their parent or guardian could not drive them to school, they would normally just use up a sick day. With video conferencing they would not have to use a sick day. In fact they could use it during an actual sick day, and spare others from getting sick. In situations where there are major outbreaks of a new type of disease why would you go to school, where everyone gets sick. They could also use it if they just don't want to leave their house.