I have some experience with schools that have ALL been issued a portable radio for direct communications to the county public safety system.
NOBODY knows how to use the radios. It's a miracle if any administrator knows how to turn it on.
If they do know how to turn it on, they don't know what channel to be on. If they got this far,
the radio either has a dead battery due to it running down and not being recharged, or, worse,
the radio never leaves the charger and the battery has a memory measured in seconds.
And, sometimes, the battery is so old that it has leaked and corroded the battery contacts on both
the battery and the radio, too, requiring that the radio be repaired.
I have little confidence in the capacity of "typical" school staff to use such a radio properly in the event of an emergency. I swear, half of them think it's a CB radio. No, I'm not kidding.
Ladies and gentlemen, the education of your children is in the hands of people who can't run a portable radio in an emergency. Do consider private schooling.