What do you do when your substitute teacher wont let you get on your laptop?
You don't get on your laptop.
try to obey the teacher
There is nothing that you can do when your substitute teacher refuses you to get on your laptop. This is because he or she has the authority to do that, and if you disobey them than you can be punished or suspended from school.
I'm not trying to be mean, but you just need to deal with it. You can survive not being on you're laptop for a bit.