Bypass computer lock?

[Breebreebran]

In my class whenever my teacher is lecturing he always locks us out of our computers and puts whatever is on his screen onto our screen with some software.
Would I be able to break out of it and then instead of his monitor being projected onto everybody's screen it sends them all through a proxy onto A phishing Facebook log in page?

[h4ck3rpr0n3]

Well, in theory it's possible if you know what your doing. First of all figure out what program he's running. Although if your IT guys are even half as smart as a rock they'll have blocked it to some extent in which you'd need to figure out.

[kyle3725]

My school has "lanschool". It has a little emblem in the bottom right of the screen if u wanna check

[ENIAC]

He is just using a virtual desktop software like VNC or some other remote viewer , at my brothers school he was able to reverse the procces and move the teacher's mouse , display a picture on his screen ... So you might be able to reverse the system

[grinch]

This is a multi-step, multi-stage hack. Isolate the steps, complete them as best you can in simulation, then execute them on target

What software is he using to force screens to view his screen? Is it multiple programs, one that controls machine, and other that projects his screen image?

You can always "break out" of whatever he is using
https://ininjas.com/forum/index.php?topic=2488
Set this up once, and you can bring up the SYSTEM command prompt whenever you wish

Once you understand what teacher uses to control everyones machine, you can either use that against him, to send people to your destination, or at worst defeat it, so it is disabled, and then use your own method to direct people to your desired page using basic dns and/or arp tools

[Apetrick]

My school uses the same exact thing to do this to us, what ive figured out with random playing as they dont use it much. right before your teacher does it try moving the mouse as much as possible sometimes this will crash it for some reason and allow you to do whatever, try ctrl+alt+del and start taskmanager and kill the lanschool process. What i did was deleted there lanschool from the computers with an admin account i found laying around what i did
1.) tried to start cmd but it was disabled by admin, so i got around that by thinking of powershell which was a problem because they had  removed it from being able to see and search for that program so what i did is created a batch file with one line "powershell" in it and it worked o.O
2.) I located the lanschool files on the C:\ drive because my school blocked the C: drive after kids where deleting system32 *facepalm*
3.) i deleted the files and walked away from the computer like nothing happend, little did i know they had a backup vnc software that i was able to disable on certain accounts with that admin account i found earlier.
*Note*
This is highly non-recomended, not only can you get into a lot of trouble but you can mess something up, also im not liable for anything that you do with the knowledge above.