As a high school teacher for 35 years, I want to second Officer Quinn’s comments. A school resource officer is probably not going to be able to take down a shooter armed with two semi-automatics, 30 bullet magazines, and dressed in bullet-proof gear, but he will have made sure that all preventive measures possible have been taken. And if sensible gun regulations are passed, the officer can be very effective indeed in dealing with a shooter.
Plus there are all of the other services Officer Quinn mentioned. I have seen the program in action, and applaud it.