Hi, thanks for your feedback !
You can turn-off the tv by interacting with it ;)
In the classroom, if you go near the teacher you can see instructions written in a color a bit different from everything else, just in front of her. She'll ask you to find your desk, grab a piece of paper (somewhere in the backward area of the class), take a pen, etc.
That being said: what would you change to make things more obvious as to what you have to do in this area ?