iTALC is a remote control system oriented towards computer workshops in schools that teachers can use to monitor the work of their students while they explain the lessons.
If while browsing the different computers you notice that a student is wasting time, take some screenshots of what he is doing before taking control of his computer.
The teacher can lock the different workstations to prevent students from being distracted, send them text messages and share their screen with the rest of the students.
Configuring more advanced options will allow the teacher to remotely reboot and shutdown computers, as well as run scripts.