“...are working to educate school communities about simple and inexpensive ways to make their buildings safer, particularly during emergencies due to an intruder, the weather or a fire. ...”
Well, Step One would be undercover armed guards to prevent a shooter from ever getting started.
Step Two would be armed teachers who are trained and proficient.
Nothing stops an active shooter like someone returning fire.
Anything else is just fluff.
I think they should train and arm the maintenance crew.