Eli5: Would Faraday Cages block Cell Signals well enough to utilize them in a classroom setting?

Question

I.e. ‘bricking the phone’ for the students benefit

In: Engineering

Answer 1

You ever heard of a box? It’s crazy but teachers can just ask them to place their phones at the start of class. No fancy stuff needed, went to certain classes in college where the professors hated it and would ask us to put our phones away to take their class (obviously they couldn’t legally keep us from the class that way but I gave it to them cause I didn’t care) mostly worked and kept phones from being common place in those rooms I was in.