i Think this is how its done, (its been a while)
* log on to the master machine as teacher no 1, add all machines in that room, log off
*log on as admin copy italc folder from copy teacher1 application folder ( in my case its \\servername\profiles\teacher1\application data\ )
and paste it in to the same folder for teacher2
* you may need teacher 2 to log on and run italc for their first time before pasting the above folder in as it may get over written