iTALC has been designed for usage in school. Therefore it offers a lot of possibilities to teachers, such as

see what's going on in computer-labs by using overview mode and make snapshots
remote control computers to support and help other people
show a demo (either in fullscreen or in a window) - the teacher's screen is shown on all student's computers in realtime
lock workstations for moving undivided attention to teacher
send text messages to students
powering on/off and rebooting computers per remote
remote logon and logoff and remote execution of arbitrary commands/scripts
home schooling - iTALC's network-technology is not restricted to a subnet and therefore students at home can join lessons via VPN-connections just by installing iTALC client

Furthermore iTALC is optimized for usage on multi-core systems (by making heavy use of threads). No matter how many cores you have, iTALC can make use of all of them.