Shooter incident at elementary school in Uvalde, Texas - 19 children and 2 adults dead

Big L. I assume this training is not necessarily schools specific. Are there different strategies for office buildings, factories, etc? I know calls are made on a situational case by case, but is the training generally the same? Some instances the victims/hostages are mostly children and other cases they are all adults or does that matter?
Generally it's the same. However, you would think the ISD police would train at the different campuses to get a feel for each school. Uvlade isn't that big, I'm sure the local PD could take time to train there too. In light of all the school shootings that occur in this country, you would think this would be common place.
The only different strategies that I taught was active shooter vs barricaded suspect.