For example, if a student sustains an injury during gym class the teacher can effectively communicate with EMT staffers before their arrival at the school, assisting with rapid and succinct actions.
Also, 911 dispatchers can call schools “to alert them to lock their doors or take other emergency precautions based on the incidents outside the school. This will prevent unanswered phone calls or other failures,”
Really? when has phone calls gone unanswered at a school. USE THE PHONES. I see BAD things happening here. Wait until one of the teachers steps on a FF trying to call a mayday; or a principal takes the radio home and decides to play traffic cop/curfew officer.
I think it's a great idea! Dispatch already has the ability to patch us through to a school official as we are enroute to communicate things like which door number we should use, and which gates will be up for us.
Phones calls go unanswered at the schools a lot of times. Maybe your kid's school has a lot more money than ours here, but plenty of times a line will ring and ring because the office staff is busy with another call.
And if you give them their own talkgroup and don't give them access to the dispatch channel, I can't see any of the situations you talk about happening. Actually, the ideal way to do it would be to assign them a talk groups (HS Tac 1 for example) and just leave their radios on that TG. If a dispatcher needed to get a hold of the school, they could "tone out" the school to quickly get their attention. Alternately, it would be a monitored TG so a teacher or principal could just hop on and ask for EMS and the dispatcher could get that info back out on the air over the dispatch TG. As they are responding, they could get a situation update, and depending on medical protocols, might even be able to offer some assistance before they get there (yes, I understand this last part would require some more training).
But I doubt with the setup I described, any firefighter could get "walked on" by a teacher unless they programmed the firegrounds into the school radio. In which case that's a failure to plan and not an issue with the system itself.