by Gareth J Barnard.
And indeed the Network Administrator can use the same software to look at any machine in the entire school. I found this feature useful for remote control to help when support questions came in over the telephone. Also useful for remote shutdown to save the carbon footprint.
On the positive side for teaching it helped to quickly have a student demonstrate what they had done and project it via the teachers (my) computer without all the technofaff of cable unplugging / log out or in.