@liamotter9-
The Roku phone app can only connect and control Roku units on the same local network as the phone is using.
So the question really is: Can you connect the phone to the school's gaming and streaming network?
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X