I don't know why this is hard. At least in the classroom if not during the entire school day.
You get a cabinet with a bunch of cubbie holes, kids put their phone in at the beginning of class, they take it out at the end of class. They can even lock and each kid takes a key with them if theft is a concern. It doesn't seem that complicated. They have these things outside every SCIF. I know they exist.
You get a cabinet with a bunch of cubbie holes, kids put their phone in at the beginning of class, they take it out at the end of class. They can even lock and each kid takes a key with them if theft is a concern. It doesn't seem that complicated. They have these things outside every SCIF. I know they exist.