Who else has been buying it.
How widespread is this>
The software is available everywhere. It's a question of how good the security is on both ends. Since the school district controls both ends, easy to do.
Ten years ago where I worked, a senior network administrator showed me how he set up spy software to monitor employees computer screens. Anything the employee saw on their screen, he could see at his remote spy screen. He had to sneak an agent onto the employees computer while they were away. The rest was easy. Management suspected some employees of doing illegal activities on their computers, so they gave a go to this network administrator. He also coupled the spying to cameras mounted in ceilings, supposedly installed to prevent non-employees from entering (but we employees knew the real intent).
I told the admin I was disgusted and wanted no part of this (I was also a senior network admin). Trust no one, and be careful of how you set up your computer.